The Fourth International is the organisation that jokes are made about, and the jokes rest on a genuine puzzle. Founded in 1938 by supporters of Leon Trotsky who expected it to lead millions within a decade, it remained small for the whole of its existence, divided into rival bodies within two years of its founding conference, split again on a world scale in 1953, and fragmented thereafter into a family of competing organisations, each presenting itself as the continuation of the founding project. A movement with that record invites ridicule, and ridicule has been the standard treatment. Yet the same tradition produced the most cited Marxist economist of the postwar decades outside the universities, the biographer who fixed Trotsky’s reputation in the English language, a party that became a principal force in one country’s politics and entered its government, and a set of ideas that travelled through trade unions, student movements and journals far beyond the reach of any membership card. Both halves of that record are facts. An account that keeps only the fragmentation is a comedy sketch, and an account that keeps only the influence is a recruitment leaflet. This article holds the two together, and it explains the fragmentation structurally, by three factors acting in combination, rather than by the personalities that popular retelling prefers.

The explanation offered here has a name, because arguments that can be named can be tested. The three-factor fragmentation holds that the movement split so often because three pressures operated on it at once and reinforced one another. Repression destroyed its cadres, exiled its leadership and taught its survivors habits of secrecy and suspicion that outlasted the emergencies which produced them. Defeat and isolation denied it the mass experience that disciplines doctrine, leaving small circles to argue questions that a living movement settles by practice. Doctrine and its disputes then supplied disagreements of a kind that could not be compromised, because they concerned the class character of states, the strategy of revolution and the authority of the organisation itself. Remove any one factor and the others become survivable. Combined, they made disagreement organisationally unabsorbable, so that disputes which a mass party would have contained as internal argument repeatedly ended as separate organisations with separate newspapers, separate headquarters and separate claims to the same inheritance. The influence, meanwhile, is measured where it travelled, in movements, parties and ideas far beyond the sections’ enrolled strength, and organisational smallness is treated throughout as a fact to be explained, never as a synonym for insignificance and never as a badge of purity.

What the Fourth International was

The Fourth International was an international association of revolutionary socialist parties and groups, founded in September 1938, which understood itself as the heir of the first three Internationals and as the organisational continuation of the struggle Trotsky had waged inside and then against the Communist International. Its founding document was the programme drafted by Trotsky under the title The Death Agony of Capitalism and the Tasks of the Fourth International, known everywhere inside the tradition as the Transitional Programme. Its national components were called sections. Its leading bodies between congresses were an International Executive Committee and a smaller bureau or secretariat, and its authority over the sections was real on paper and contested in practice from the beginning. To grasp what kind of thing it was, a reader should hold three descriptions together at once. It was a party in embryo, organised on the model of democratic centralism and claiming the right to direct a world movement. It was a school, preserving and teaching a body of doctrine its members believed the larger workers’ movement had abandoned. And it was a network of exiles, translators, printers and couriers whose material existence depended on a handful of cities and a handful of patrons. Each description explains part of the record. The party in embryo explains the ambition. The school explains the doctrinal intensity. The network of exiles explains the fragility.

Its prehistory matters because the organisation inherited its habits before it inherited its name. Trotsky had organised the Left Opposition inside the Russian party from 1923, arguing against the doctrine that socialism could be completed inside one country and against the bureaucracy he held responsible for defeats abroad. Expelled from the party in 1927 and from the Soviet Union in 1929, he built an International Left Opposition among sympathetic groups in many countries, which became the International Communist League in 1933. For most of that period he still described the Communist International as a patient to be cured rather than a corpse to be replaced, and his supporters worked as a faction seeking to reform it. The turn came in 1933, when the German workers’ movement, the strongest in Europe, was destroyed by Nazism without the Communist International acknowledging error or changing course. Trotsky concluded that an organisation which could pass over that catastrophe in silence was dead as an instrument of revolution, and he raised the call for a new International. The five years between that conclusion and the founding conference were spent gathering the fragments willing to follow him, in conditions of illegality in much of Europe and of active pursuit by the Soviet security services everywhere. The founder’s own itinerary sets the tone of the whole story: Turkey, France, Norway and finally Mexico, each refuge narrower and less secure than the one before, with the founder’s son and closest collaborators dying in circumstances their movement attributed, with substantial evidence, to Stalin’s agents.

What happened at the founding conference near Paris?

The founding conference met on 3 September 1938 at Alfred Rosmer’s house at Périgny, outside Paris, delegates speaking for sections in eleven countries, proceedings compressed into one day for security. The gathering adopted the Transitional Programme as its founding document, elected an executive, proclaimed the Fourth International into existence and dispersed before it could be disturbed.

The compression of that conference deserves attention, because later legend in both directions has inflated it. Admirers have treated the founding as a world congress; detractors have treated it as a fiction staged for the record. The documentary evidence supports a plainer description. A small number of mandated delegates, representing organisations of very unequal size and in several cases organisations that existed mainly as circles of committed individuals, performed the legal act of foundation: programme adopted, leadership elected, affiliation declared. Trotsky himself was absent, directing matters from Mexico by letter and through emissaries, and his absence was characteristic. The International was founded by a man who could not safely enter the continent where it was founded, on behalf of a movement whose strongest sections were illegal, at a moment when war was visibly approaching and when the founder believed that the coming war would shatter the old order and open the road his organisation existed to travel. That belief, that history was about to deliver the audience the movement lacked, is the key to the founding. The Fourth International was not designed as a permanent small society for the preservation of texts. It was designed as a general staff waiting for an army, and much of its later anguish came from the army’s failure to arrive on schedule.

The expectation of rapid growth was not a private fantasy of the founder’s old age. It was written into the founding analysis, which held that the crisis of capitalism had reached its final stage, that the masses were being driven toward revolution by the intolerable conditions of the epoch, and that the sole obstacle was a crisis of leadership: the established parties, social democratic and Communist alike, were held to be betraying a situation their members wanted to resolve. On that analysis, a small organisation with the correct programme could grow with extraordinary speed once events exposed the old leaderships, because the demand for what it offered already existed and only the supply was missing. The analysis gave the movement its energy and its impatience. It also built a trap into the foundations. If growth failed to arrive, the analysis permitted two readings: the objective situation had not yet matured, which counselled waiting and holding the doctrine intact, or the organisation’s own application of the doctrine was at fault, which counselled internal struggle over strategy. Both readings were used, repeatedly, and the second one turned every strategic disappointment into a dispute about who had misapplied the inheritance. A fuller account of the founder’s thought, as distinct from the organisation he founded, belongs to the study of leon trotsky intellectual biography, which traces how his ideas developed across the whole arc of his career.

Why the Fourth International was founded when it was

The timing of the foundation explains its character better than any statement of aims. By 1938 the movement’s leaders believed that delay had become more dangerous than prematurity. The Moscow Trials of 1936 to 1938 had staged the liquidation of the generation that made the Russian Revolution, with Trotsky condemned in absentia as the organiser of imaginary conspiracies, and the trials were accompanied by a campaign of assassination against his movement abroad. His son Lev Sedov, who ran much of the International’s practical work from Paris, died in February 1938 after an operation in a clinic to which Soviet agents had penetrated. Rudolf Klement, the organisation’s secretary, disappeared in Paris in the summer of 1938 and his body was recovered from the Seine. Erwin Wolf, another secretary, had vanished in Spain. The roll of the dead and disappeared in the movement’s own leadership, before the International formally existed, was long enough to constitute an argument: the cadres were being destroyed faster than they could be replaced, and without a constituted International the survivors would scatter into national groups with no common centre and no common programme. Foundation was therefore an act of conservation as much as of ambition. A proclaimed International, with a programme and an executive, was something that could survive the death of individuals, and its founders were conscious that individuals among them were being killed.

A second pressure ran in the same direction. The Spanish Civil War had demonstrated to the movement’s satisfaction, and to considerable independent evidence, that the Communist International’s strategy in Spain subordinated revolution to the diplomatic needs of the Soviet state, and that the social democratic parties offered no alternative capable of winning. The French Popular Front had risen and subsided. Austria’s workers had been crushed in 1934, Germany’s in 1933, and the movement read the sequence as proof that the epoch’s defeats were defeats of leadership rather than of possibility. Whether that reading was right is a question on which historians divide, and the strongest version of the contrary case, that the defeats reflected material balances no leadership could have reversed, deserves its full weight in any honest account. What matters for understanding the foundation is that the founders held their reading with complete conviction, and that conviction made a new International a duty rather than a preference. The doctrinal content of the quarrel with the Communist International, the theory of permanent revolution against socialism in one country and the analysis of the Soviet bureaucracy, is treated in its own right in trotskyism vs stalinism, and readers who want the argument itself rather than its organisational consequences should go there next.

The founding generation also carried a specific memory that shaped its institutional choices. Its members had watched the Communist International, built as a world party with binding discipline, degenerate in their analysis into an instrument of one state’s foreign policy, its sections purged and its strategies dictated. They were determined to build an International that could not be captured by any state, and the determination produced a paradox they never resolved. A centre strong enough to hold sections to a common programme was also a centre capable of the abuses they had fled; a centre weak enough to be safe was too weak to hold anything. The movement’s statutes promised the strong version. Its resources delivered the weak one. Much of the organisational history that follows, including the crisis of 1953, is the working out of that gap between the authority the centre claimed and the authority it could actually exercise over sections separated from it by oceans, languages, illegality and war.

The war that arrived in 1939 then subjected the infant organisation to a test no founding document could survive unchanged. International communications collapsed. Sections in occupied Europe were driven underground or destroyed; the German and Austrian comrades of the founding generation were largely murdered or scattered; the International’s centre of gravity shifted to the United States, where the Socialist Workers Party was its largest and best resourced section, and to Latin America, where groups in several countries gave the movement a presence the European catastrophe had thinned. Trotsky’s assassination in Mexico in August 1940, by an agent of the Soviet security services who had insinuated himself into the household, removed the one figure whose personal authority might have arbitrated the disputes the war was already generating. The founder had expected the war to end, as the previous war had ended in Russia and Germany, in revolutionary upheaval, and had expected his International to be transformed by that upheaval into a mass force. The upheaval came in several countries and took forms his analysis had not predicted, a discrepancy between expectation and event that runs through everything the movement did afterward and that belongs to the second of the three factors, defeat and isolation, examined in its place below.

The Transitional Programme and the method it taught

The founding document repays close reading because the movement’s later disputes were, to a remarkable degree, disputes about its application. The Transitional Programme begins from a diagnosis: the productive forces of humanity have ceased to grow under decaying capitalism, and the objective prerequisites for socialism are not merely present but rotting, so that the crisis of the proletariat reduces itself to the crisis of its revolutionary leadership. From that diagnosis the document builds a method. Between the minimum programme of reforms that social democracy had made its ceiling and the maximum programme of revolution that it had made its distant hymn, the Transitional Programme inserts a bridge: demands that arise from the conditions and consciousness of broad layers of workers, and that lead in their own logic toward the conquest of power. A sliding scale of wages, rising automatically with prices, defends living standards in a way that points beyond the wage system. A sliding scale of hours, dividing the available work among all hands, answers unemployment in a way that challenges the right of capital to decide who eats. Factory committees, the opening of the books of the great firms, the expropriation of private banks and the monopolised heights of industry, workers’ control of production, a workers’ and farmers’ government: the demands form a ladder, and the ladder is the argument. Workers who fight for a transitional demand and meet the refusal of the system learn, in the programme’s expectation, that the demand cannot be granted within the old order, and so arrive at revolutionary conclusions by their own experience rather than by lecture.

The elegance of the device is genuine, and so is its difficulty. Every term of the method depends on a judgement that events cannot settle cleanly. Whether a demand functions as transitional depends on the state of the economy, the temper of the class, the strength of the organisation advancing it and the response of the employers and the state, all of which are matters of estimation on which honest and informed people differ. A demand that is transitional in a rising movement is a utopian slogan in a quiet one and a reformist diversion, in the tradition’s own vocabulary, when it is advanced as a substitute for the struggle for power. The programme thus handed every section a method that required continuous strategic judgement, and simultaneously handed every internal critic a weapon: any failure could be redescribed as a misjudgement of the transitional character of the demands, and any rival leadership could be accused of sliding from transitional agitation into either reformism or empty ultimatism. In a mass party, disputes of that kind are damped by shared practical work and by the discipline of responsibility for real constituencies. In small propaganda groups, they are the whole of political life. The method therefore belongs inside the explanation of fragmentation, as a doctrinal machine for generating disputes that no vote and no document could conclusively end. Generations of the movement’s internal bulletins were consumed by arguments over whether this or that demand, in this or that country, occupied the correct rung of the ladder, and the arguments mattered to the participants precisely because the founding document had made the ladder the test of fidelity.

What made a demand transitional rather than reformist?

A demand counted as transitional when its realisation overflowed the limits of capitalist property relations, so that fighting for it led workers toward power. A reform stayed within those relations and could be granted without threatening them. The distinction turned on context and consequence, not on wording, which is why disputes about classification could never be settled by quotation.

That answer, correct as far as it goes, also locates the permanent source of argument. The same demand, word for word, could change category as circumstances changed. Indexation of wages in a period of full employment and strong unions is a collective bargaining technique; in a period of inflationary crisis pressed by factory committees it becomes, in the programme’s logic, a challenge to the right of employers to set the terms of life. The classification depends on who advances the demand, under what slogans, with what forces and toward what end, and each of those variables is contestable. Two comrades reading the same founding text in the same city could therefore reach opposite conclusions about the same campaign, each armed with genuine passages, each able to present the other’s position as a departure from the programme. The movement never found, and arguably never sought with full seriousness, an arbiter for such disputes whose authority both sides would accept in advance of the verdict. Congresses voted, and the defeated side in a small organisation faced a choice between submission to a judgement it believed ruinous and separation in the name of the programme itself. Separation won often enough to become the tradition’s signature, and the frequency had less to do with the vanity of the participants than with the structure of the appeal they were all making: to a text whose correct application was exactly the matter in dispute.

The programme also covered the movement’s attitude to the great questions of the epoch: the war it regarded as imminent, the Soviet Union it defended against imperialism while seeking to overthrow its bureaucracy by political revolution, the colonial world whose democratic demands it supported as part of the road to socialist revolution, and the united front tactics by which small revolutionary organisations should seek common action with the mass parties without dissolving into them. Each of those positions contained the seed of a later split, and the largest of them, the character of the Soviet state, produced the first great division within two years of the founding. Understanding that division requires the doctrine to be stated plainly. In Trotsky’s analysis, the Soviet Union remained a workers’ state, degenerated under a parasitic bureaucracy, because the property forms created by the October Revolution, nationalised means of production and a planned economy, survived beneath the political expropriation of the working class. Defenders of that view held that the bureaucracy was a caste rather than a class, resting on property relations it had not created and could not bequeath, and that revolutionaries should defend the Soviet Union against imperialist attack while preparing the political revolution that would restore soviet democracy. The analysis was subtle, internally consistent and, as events arranged themselves in 1939, almost perfectly designed to tear a small movement apart.

The first great split and the Soviet question

In August 1939 the Soviet Union signed its non-aggression pact with Germany. In September it invaded Poland from the east, partitioning that country with the Reich. In November it attacked Finland. For the members of the Fourth International in the United States, its strongest section, the sequence posed a question that could not be deferred. An organisation pledged to the unconditional defence of the Soviet Union against imperialism now faced a Soviet state acting, in partnership with Nazism, as a partitioner of neighbouring countries and a belligerent against a small nation. Inside the Socialist Workers Party a minority gathered around Max Shachtman and James Burnham concluded that the events had falsified the founding analysis: a state that behaved in that fashion, they argued, was not a workers’ state in any sense that obliged revolutionaries to defend it, and they developed the theory of bureaucratic collectivism, a new social formation neither capitalist nor socialist, ruled by a bureaucratic class. The majority, led by James P. Cannon and armed with Trotsky’s interventions from Mexico, held the founding position: the property forms decided the class character, the bureaucracy’s crimes did not alter the forms, and defence remained obligatory. Trotsky wrote some of his most concentrated polemics in that fight, and the dispute consumed the section for months before the minority departed in 1940 to found a separate organisation.

Why did the Soviet question divide the movement after the pact with Germany?

The pact with Germany, the partition of Poland and the invasion of Finland made the Soviet Union’s character a practical question rather than a theoretical one. Members obliged to defend a state now acting beside the Reich split over whether its property forms made it a workers’ state, and no agreed test existed to decide between the rival readings.

Three features of that episode set the pattern for everything that followed. First, the question at issue was genuinely undecidable by the methods the movement possessed. Whether nationalised property beneath a totalitarian bureaucracy constituted a workers’ state depended on prior judgements about what makes a state belong to a class: the forms of property, the political power of the class in question, the direction of historical movement. Evidence could be marshalled in quantity for every position, and no experimentum crucis was available. A dispute of that structure does not end; it institutionalises. Second, the dispute was conducted inside an organisation built on democratic centralism, in which the minority was expected, after the vote, to defend publicly a line it considered disastrous. In a mass party with newspapers, unions and municipal responsibilities, such discipline has compensations: the minority trades obedience for influence over real events. In a small organisation whose chief product is its doctrine, the minority trades obedience for the obligation to propagandise what it believes to be falsehood, and the price of unity rises accordingly. Third, the founder’s authority was the only court of appeal both sides acknowledged, and the founder was a partisan in the case. Trotsky’s writings in that dispute are formidable, and his assassination in the middle of it froze the argument at the moment of his last word. After August 1940 there was no arbiter at all, only texts, and texts can be quoted by everyone.

The 1939 and 1940 split also demonstrates why the fragmentation cannot be laid at the door of personality alone, tempting as the biographical road is. The American dispute was argued by people of real ability on both sides, over a question that any Marxist organisation of the period had to answer, in circumstances created by the diplomacy of two great powers. Similar disputes erupted independently elsewhere, in France, in Britain, in the exile groups, because the stimulus was general. When the same question divides organisations that share neither leaders nor local quarrels, the explanation must lie in the question and in the organisational form through which it was processed, rather than in the temperaments of the processors. That is the first instalment of the three-factor fragmentation: doctrine supplied a dispute with no empirical resolution; the organisational form converted an unresolved dispute into a separation; and the conditions of the movement, hunted, exiled and at war, supplied the heat. The full comparison between the two doctrines whose quarrel organised the epoch, permanent revolution and the bureaucratic analysis on one side and socialism in one country on the other, is developed in trotskyism vs stalinism for readers who want the ideas before their consequences.

The subsequent career of the departing minority carries its own analytic weight. Shachtman’s organisation moved by stages away from the positions of 1940, through an independent socialism toward, in its later phases, an alignment with the American labour establishment and the foreign policy of the United States, a trajectory its critics inside the tradition cited as proof that abandoning the founding analysis of the Soviet Union led by logic out of revolutionary politics altogether. Defenders of the minority replied that the trajectory proved the opposite: that a movement obliged to characterise every state formed on the Soviet model as some species of workers’ state would end by apologising for regimes its members abhorred, and that honesty about the bureaucracy was the precondition of an independent socialism. The exchange matters here because it never ended. Versions of it recurred when the Soviet model was replicated in Eastern Europe after the war, when Yugoslavia broke with Moscow, when China and Cuba made revolutions under leaderships the movement had not predicted, and at each recurrence the movement’s sections divided not only over the new state but over the accumulated verdicts of the previous rounds. Doctrine with no empirical resolution does not merely divide an organisation once. It compounds, like interest, because every new application reopens the original account and adds the charge of inconsistency to the charge of error.

Repression: the first factor

Fragmentation is usually narrated from the inside, as an affair of programmes and personalities, and the narration quietly deletes the conditions under which the narrated people lived. The Fourth International was, for the first decade of its existence, a hunted organisation, and the hunt was conducted by professionals. The Soviet security services treated the Trotskyist movement as a priority target out of all proportion to its size, because its founder was the living alternative symbol to Stalin’s legitimacy and because its members inside the Soviet Union had been drawn from the generation of October. Inside the Soviet Union itself the Left Opposition was annihilated as an organised force in the years of the Terror: its members were arrested in waves, sent to camps and in large numbers shot, and the handful who survived did so as isolated individuals. A movement’s memory is carried by people, and when the people who remembered the Russian debates at first hand were dead, the tradition’s Russian root was severed. What survived abroad was a doctrine whose originating context had been physically destroyed, taught by exiles to recruits who knew the Soviet Union from newspapers.

Abroad, the hunt followed the exiles with a patience the record has since documented in detail. Sedov and Klement and Wolf were only the most prominent of the movement’s cadres to die at the hands of the apparatus before the war. Agents penetrated the movement’s Paris centre, stole archives Trotsky had deposited for safety, sat in on its internal life and reported its addresses. The founder’s household in Mexico was attacked by a raiding party in May 1940 before the successful assassination in August of that year. The consequence for the organisation’s culture was deep and durable. A movement that has been genuinely infiltrated learns to suspect, and suspicion is a solvent of internal trust. Factional opponents were liable to be suspected of worse than error; security consciousness raised the temperature of internal dispute by adding a dimension in which the stakes were not mistaken lines but survival. Later generations inherited the suspicion without the circumstances that had made it rational, and the inheritance helps explain why internal arguments in this tradition so often carried a charge of moral accusation disproportionate to their ostensible subject.

Repression by the movement’s other enemies compounded the Soviet hunt. In Germany and Austria the cadres of the founding generation faced the Gestapo. In occupied France the movement’s militants worked in an illegality that consumed several of them, among them young organisers who produced clandestine papers and built cells among soldiers of the occupying army, work of real courage that ended, for some, in arrest and death. In colonial territories the movement’s sections faced the police of empires: the Ceylonese party discussed below worked under wartime emergency regulations and its leaders were imprisoned by the British; Vietnamese Trotskyists, who had built one of the movement’s most substantial followings anywhere, were destroyed in 1945 in the settling of accounts that followed the August Revolution, killed by their Communist rivals and by the returning French alike. In the United States the repression took legal form: the leadership of the Socialist Workers Party was prosecuted in 1941 under the Smith Act for its doctrines, convicted and imprisoned, a case that became a landmark in the history of American civil liberties. The point of cataloguing these pressures is not martyrology. It is arithmetic. Every cadre killed, imprisoned or driven into hiding was a carrier of experience removed from a very small stock. The movement’s doctrinal disputes were argued by survivors, in organisations perpetually missing the people who might have settled them by weight of shared experience, and the disproportion between the losses and the size of the whole is the first factor in its simplest form.

Why did the Fourth International split so often?

Three structural reasons combine to explain the pattern. Democratic centralism applied to small groups makes disagreements unabsorbable. The transitional method requires judgements no evidence can settle. And the class nature of the Soviet Union functioned as a doctrinal test with no empirical resolution, so positions hardened into organisational identities.

The repression factor also shaped the movement’s geography, and geography shaped its politics. After 1945 the International’s effective centre sat in Paris, in a Paris rebuilt by survivors, while its strongest sections were in the Americas and in Ceylon and its weakest in the Europe where the founding questions had been posed. Communication between centre and sections ran through emigration networks, translated bulletins and occasional travellers, and it ran slowly. A centre that cannot observe its sections governs by document and by emissary, and documents invite literalism: a resolution drafted for general application arrives in a country its drafters have never seen, and the local argument about its meaning becomes an argument about loyalty to the centre. The pattern recurs in the crisis of 1953, where the disputed questions were precisely the centre’s right to intervene in a section’s internal affairs and the strategy the centre pressed upon sections whose circumstances it knew at second hand. Repression had made the centre remote; remoteness made its authority brittle; brittleness made its interventions explosive. The three factors are separate for purposes of analysis and were fused in experience, which is why single-cause explanations of the fragmentation, whether flattering or hostile, always leave most of the record unexplained.

A further consequence of the hunt deserves record because it conditioned the movement’s intellectual life. Archives were lost, seized, burned for safety or scattered among private hands across three continents, and the documentary basis of the tradition’s history was for decades fragmentary and partisan, held by factions and published selectively. Historians of the movement worked from internal bulletins preserved by the victors of internal disputes, and every faction’s account of every split was for years the account written by its own secretariat. The scholarly literature that eventually corrected the factional record, biographies and studies produced inside and outside the tradition, had to reconstruct events from correspondence dispersed among libraries in Amsterdam, Harvard, Stanford and elsewhere. A tradition whose evidence is scattered by its enemies argues about its past with unusual ferocity and unusual uncertainty at once, and both qualities were visible in its internal life long after the physical danger had passed.

Defeat and isolation: the second factor

The second factor is the gap between the movement’s founding expectation and the century it actually lived through. The Transitional Programme assumed a world in revolutionary crisis, in which the masses, driven by the decay of capitalism, would seek a revolutionary leadership and find the old parties wanting. The postwar world refused the assignment. In Western Europe the war ended with reconstruction under governments of national unity, an expanding economy and mass parties, Communist and social democratic, whose authority among workers stood higher than before the war. In Eastern Europe the Red Army installed regimes on the Soviet model, and revolutions did occur, in Yugoslavia, China, Cuba and Vietnam, but they were made by forces outside the movement’s tradition, under leaderships that owed it nothing and in the Chinese and Vietnamese cases had murdered its adherents. The movement confronted a recurring situation its founding categories handled badly: transformations it welcomed in the abstract, accomplished by agencies it opposed, producing states it could not classify without internal war. Each such event was a fresh examination in the subject the movement could not pass without dividing.

Isolation followed from the defeats, and isolation has organisational consequences that are insufficiently appreciated by the movement’s mockers. A political organisation learns from its environment. A mass party arguing inside a real labour movement receives constant correction: demands are tested against audiences, leaders are measured by results, and disputes are settled or dissolved by the pressure of shared work. An isolated propaganda group receives no such correction. Its audience is itself. Its disputes are settled by the only instruments at hand, the text and the vote, and its leaders are measured by their command of doctrine. Isolation thereby selects for exactly the skills that make fragmentation worse: exegesis, polemic and factional organisation, while it starves the skills that make unity valuable: negotiation, compromise and the management of people who disagree. The movement’s celebrated literary culture, its journals of genuine quality and its command of Marxist scholarship, was the other face of the same isolation. Cut off from the movement it sought to lead, the tradition did what isolated intellectuals under discipline do: it wrote, and what it wrote is a large part of the influence mapped later in this article.

The founding generation’s isolation was also demographic, and demography is unforgiving. The International was built by people formed in the Communist movements of the nineteen twenties, and it recruited during the war and after among students and young workers in numbers that varied sharply by country. Where it found an implantation in industry, as in the American Midwest, among Bolivian miners, among Ceylonese plantation and transport workers, its politics acquired the ballast of constituency. Where it remained a circle of the convinced, its politics acquired the volatility of the seminar. The unevenness explains a feature of the record that purely doctrinal accounts miss: the same International, the same programme and the same centre produced sections of strikingly different character, some rooted and durable, others existing as letterheads exchanged among factions. A reader asking why the movement stayed small will find part of the answer in the competitive environment. The postwar worker who wanted a party of the left had mass organisations with newspapers, deputies, union machines and, in the Communist case, the prestige of Stalingrad and the Resistance. The Trotskyist sections offered a programme, a history and a critique of those machines, goods whose value is real but whose market, among people choosing where to spend scarce evenings, is narrow in the best of times and vanishing in times of rising wages.

The defeats also had a rhythm that tormented the movement’s expectations. Again and again a crisis arrived that seemed to fulfil the founding diagnosis: France in 1968, Portugal in 1974 and 1975, Poland in 1980 and 1981, the collapse of the Soviet Union itself at the end of the nineteen eighties. In each crisis the movement’s sections grew, sometimes rapidly, won audiences they had never commanded and recruited cohorts that transformed their composition. And in each aftermath the growth subsided short of the transformation the doctrine had led its members to expect, leaving behind enlarged organisations with enlarged disagreements and a fresh supply of retrospectives in which the failure was assigned, by the established method, to errors of application. The cycle of hope and recrimination is not unique to this tradition; it is the common experience of revolutionary movements in a century that rewarded other kinds. But the cycle interacted with the movement’s doctrinal machinery to produce its specific pathology, because the founding text’s promise, that the crisis of humanity was the crisis of revolutionary leadership, located the cause of every defeat inside leadership, and therefore inside the movement itself. A tradition taught to explain defeat by the failures of leaders will conduct its internal life as a permanent tribunal, and tribunals do not compromise.

Doctrine and its disputes: the third factor

Doctrine mattered to this movement with an intensity that outsiders consistently underestimate, because doctrine was the movement’s title deed. A social democratic party holds its identity in its electorate, its unions and its municipalities; a Communist party of the classical period held its identity in its allegiance to a state and a centre. The Fourth International held its identity in a body of propositions: that the epoch was one of capitalist decay, that the Soviet Union remained a workers’ state to be defended and politically transformed, that revolutions in the colonial and semicolonial world would grow over into socialist revolution or be strangled, that the mass parties’ leaderships were the chief obstacle between the working class and power. To abandon a proposition was not to adjust a policy but to alienate a portion of the estate, and the members knew it, which is why their doctrinal disputes were conducted with the ferocity of inheritance litigation. The three-factor fragmentation names the resulting mechanics precisely: first, small-group democratic centralism, which demanded public unity after internal votes and so made every lost vote a choice between self-censorship and departure; second, the transitional method, whose applications no evidence could determine; third, the class nature of the Soviet Union and of the states built in its image, a doctrinal test whose answer allocated praise and blame for the largest events of the age and which no enquiry could settle to general satisfaction. The factors multiplied one another. The Soviet question supplied the disputes, the transitional method supplied a second front of dispute in every campaign the sections fought, and the organisational form ensured that disputes ended in court or in schism rather than in the slow dissolution that mass practice provides.

Democratic centralism itself, the principle that an organisation debates freely until a decision is taken and then acts as one, is examined as a principle in democratic centralism explained, and the present article is concerned only with what the principle does under specified conditions. In a party of hundreds of thousands with a press, parliamentary fractions and trade union positions, the principle operates inside a dense medium of other loyalties and other rewards. A defeated minority retains its union posts, its local influence and its prospects at the next congress, and can afford patience. In a group of forty people in one city, a defeated minority retains the obligation to sell a paper whose line it has just argued is ruinous, in the company of the same forty people, under a leadership whose victory is total because the organisation’s life is small enough to be wholly governed by its centre. The principle’s demands are identical in the two cases and its costs are incomparable. Much of what is called the sectarianism of small groups is the arithmetic of this difference, and it operates on any doctrine, in any country, wherever the conditions are reproduced. That universality is the analytic heart of the three-factor claim: the fragmentation is not a curiosity of one tradition’s culture but a predictable output of specified inputs, and it would recur, and has recurred, in other traditions that combined centralised discipline, unfalsifiable strategy and a doctrinal test about the largest power claiming their allegiance.

How did democratic centralism work inside small sections?

Between congresses a section debated its course in branches and in internal bulletins, voted at conferences and then expected every member to defend the adopted line in public activity. Dissenters could organise as a tendency, and at times as a faction, but persistent public disagreement after a vote breached discipline and opened the road to expulsion or departure.

The lived texture of that system explains both its achievements and its costs. The discipline was real and productive: tiny organisations published newspapers of professional finish, intervened in strikes with a coherence larger bodies envied and preserved an international correspondence across wartime frontiers, feats of coordination impossible without the expectation that a decision, once taken, bound everyone. The costs were the mirror image. Because public unity was the norm, internal opposition had to be organised to be heard at all, and organised opposition inside a centralised body is indistinguishable, from the leadership’s chair, from a rival government in waiting. Leaders learned to treat factions as embryonic splits; factions learned to prepare for the treatment they expected; and the anticipation on both sides repeatedly produced the event anticipated. A substantial literature of organisational sociology describes the same spiral in churches, parties and revolutionary movements of every allegiance, and the Trotskyist record is valuable to that literature precisely because the movement documented itself so thoroughly. Its internal bulletins, conference minutes and factional platforms survive in bulk, an archive of self-observation unmatched among movements of comparable size, and researchers who study how small ideological organisations behave under stress treat that archive as a laboratory.

Doctrine also divided the movement along a seam less noticed than the Soviet question but nearly as productive of separation: the relation to other forces of the left. The founding documents envisaged a small revolutionary organisation addressing mass parties from outside, seeking united fronts with them against common enemies while preserving total independence of programme and criticism. Experience complicated the picture in every country. In France in 1934 Trotsky himself directed his supporters to enter the socialist party, judging that a radicalising mass organisation offered an audience no independent group could reach, and the French turn, the origin of entryism, is treated in its own section below. After the war the question generalised. Should the sections enter the mass parties where a generation was in motion, or build independent parties and risk the margins? Should they support, critically, colonial revolutions led by nationalists, and how critical was critical? Should they regard the regimes installed in Eastern Europe as conquests of the working class or as its defeats, and did the answer change what a section in Paris or Colombo was to do on Monday morning? Each question was practical and each was doctrinal, because the founding texts gave principles for all of them and instances for none, the founder having died before the postwar world existed. A movement that claimed continuity through a founder’s method rather than through institutions faced, at every novelty, the unanswerable question of what the founder would have said, and answered it in competing voices.

The doctrinal disputes therefore deserve to be read as the movement’s politics, not as a distraction from it. When sections argued over whether the regimes in Eastern Europe were degenerated workers’ states, deformed workers’ states, bureaucratic collectivist formations or state capitalist economies, they were allocating their stance toward the dominant fact of the postwar order and toward the Communist parties that competed with them for the same audiences. When they argued over the transitional character of a demand, they were deciding what to say at the factory gate. The outsider’s picture of scholasticism, of monks disputing angels, survives only by ignoring what the disputed propositions governed. The better criticism, and it is a serious one, runs in the opposite direction: that a movement which made its practical choices depend on classifications that evidence could not determine had built a machine whose disputes were guaranteed to be interminable, whatever their subject. That criticism is the strongest form of the third factor, and the movement’s own most reflective writers, from its economists to its historians, circled it repeatedly without ever quite conceding it, since conceding it dissolved the claim that correct doctrine was the tradition’s reason to exist.

The great world split and the long fragmentation

The second great division, when it came in 1953, was fought over the centre’s authority and the strategy the centre derived from its reading of the postwar world. Michel Pablo, the International’s secretary, argued that the objective process was driving the mass Communist and social democratic parties toward revolutionary positions under the pressure of war and crisis, that the Soviet bureaucracy itself was being compelled to extend revolution beyond its borders, and that the sections should therefore practise a deep entry into the mass organisations, entryism of a special kind measured in years rather than months, as the road by which small forces could be present where history was moving. The analysis, delivered in documents of considerable sophistication, asked the sections to subordinate their independent profiles to a long immersion, and it asked the centre to enforce the subordination. Opposition gathered in the American, British and French sections, whose leaders held that Pablo’s perspective dissolved the movement’s independence into the very apparatuses it existed to oppose, and that the methods used to impose it, including the centre’s intervention against the French majority, violated the movement’s own statutes. In November 1953 the opposition constituted itself as an International Committee, and the Fourth International existed thereafter in two rival editions, each with its executive, its press and its claim to the founding succession.

How did the great split over strategy reshape the movement?

The division separated the International into a secretariat centred in Paris and a committee centred in the United States, each claiming continuity with 1938 and each recruiting sections to its standard. A partial reunification followed a decade later, but several important currents stayed outside it, and the habit of rival centres claiming one inheritance became permanent.

The issues in 1953 repay the same structural reading as those in 1940. Beneath the charges and counter-charges lay the centre’s chronic weakness: an international leadership without a mass base of its own, governing sections larger than itself, attempting to impose a perspective that required those sections to surrender the independent existence which was their members’ chief asset. Pablo’s strategy asked, in effect, for trust on a world scale, extended over years, in a movement whose stock of trust had been drawn down by exile, defeat and the memory of how the Communist International’s centre had behaved when it possessed real power. The opposition’s victory in several countries was equally structured. The American leadership that led the resistance defended the independence of sections with the tenacity of men who had been prosecuted by their own government for their doctrines and were not disposed to subordinate the organisation that had survived the Smith Act to a secretariat in Paris. Both sides could quote the founder. Both sides did. The reunification of 1963, when the greater part of the two bodies merged in a United Secretariat after converging judgements on Cuba and Algeria had narrowed the practical distance, proved that the division had never been about an unbridgeable doctrinal gulf: the merged organisation contained, from its first day, public tendencies spanning the disputed ground. What reunification could not do was gather in the currents that had consolidated outside, some of which had built internationals of their own in embryo, nor could it restore the premise that one centre spoke for the tradition. The family pattern was set. Across the following decades the tradition organised itself into a constellation of internationals and proto-internationals, some maintaining fraternal relations, some denouncing one another in terms reserved for class enemies, all teaching substantially the same founding documents to substantially separate audiences.

Counting the resulting bodies is an exercise the article deliberately avoids in detail, for two reasons that are themselves part of the analysis. The first is that the number changes with the counting rules: by some reckonings every tendency with an international bureau qualifies, by others only the substantial formations, and the rival reckonings are themselves factional documents. The second is that a census of fragments invites the comic treatment the subject has suffered enough, and adds nothing to understanding. What can be said without a scorecard is that the plurality is permanent and self-reproducing, that each fragment teaches a version of the same history in which its own continuity is the thread and the others are deviations, and that the fragments compete less for members, whom they recruit from the same narrow pools, than for the inheritance itself: the right to say what the founding documents mean. A tradition whose supreme asset is an interpretation will multiply custodians of the interpretation as reliably as it multiplies interpretations, and the multiplication is the three-factor machine still running on its original fuel.

To steelman the movement against the obvious verdict on this record is necessary before any verdict is given, and the steelman is stronger than the jokes suggest. The premise of one organisation was itself an inheritance from the Communist International, and the movement’s critics inside its own ranks periodically asked whether the premise deserved its authority: whether a tradition might not legitimately exist as a family of organisations sharing a programme and a history, as the social democratic tradition exists, without a single centre anathematising the rest. On that reading, the fragmentation is the normal condition of a doctrine that takes itself seriously in an epoch that gave it no mass party to inhabit, and the rival internationals are better compared to the denominations of a church that survived its founder than to the wreckage of a party. The comparison has force, and the denominational reading explains features the failure reading cannot, notably the tradition’s longevity and its intellectual fertility, both of which exceed those of many organisations that never split at all because they never contained enough life to divide. The failure reading retains its force at the level of the movement’s own declared aim. The Fourth International was not founded to be a denomination. It was founded to lead revolutions, and by that standard, its own standard, the fragmentation is a defeat to be explained rather than a condition to be normalised. Both readings are carried through the remainder of this article, because the legacy contains both: an organisation that failed at its founding purpose, and a body of thought and practice that outgrew the organisation and entered the general culture of the left.

The fragmentation and influence table

The fragmentation and influence table sets the two halves of the record side by side, because they are usually exhibited separately, by the movement’s enemies and its publicists respectively, and the separation is the distortion. The upper panel lists the principal divisions with the issue that produced each and the bodies that resulted. The lower panel lists the fields in which the tradition’s work travelled beyond its own ranks, with the specific contribution in each field named rather than gestured at. A reader who studies both panels together sees the phenomenon whole: an organisation repeatedly unable to contain its disagreements, inside a tradition repeatedly able to exceed its organisation.

Division or field	Issue or area	What resulted or what was contributed
Division of 1940 in the United States	Class character of the Soviet Union after the pact with Germany and the Finnish war	Majority held the founding analysis; minority departed to build a separate organisation around bureaucratic collectivism
Division of 1953 on a world scale	Strategy of deep entry into mass parties and the centre’s right to direct sections	Rival international leaderships formed, one around the secretariat in Paris and one around a committee in the United States
Partial reunification of 1963	Convergence over Cuba and Algeria narrowed earlier disputes	A united secretariat gathered most currents while several significant organisations remained outside the merger
Fragmentation across later decades	Competing readings of the founding programme and of each postwar transformation	A family of internationals and currents, each claiming continuity with the founding conference
Marxist economics	Reconstruction of Marx’s economic theory and analysis of the postwar boom	Ernest Mandel’s treatise on Marxist economics and his study of late capitalism entered wide scholarly circulation
Historical biography	Trotsky’s life and the record of the Russian Revolution in English	Isaac Deutscher’s three-volume biography set the terms on which the English-reading world judged its subject
The postwar new left	Formation of a generation radicalised outside the old mass parties	Veterans and texts of the tradition staffed, edited and argued through many of the new movement’s journals and campaigns
Ceylon and Sri Lanka	A party of the tradition as a national force	The Lanka Sama Samaja Party became a principal party of the island, led strikes and entered a coalition government
Entry into mass parties	Work inside social democratic organisations by declared revolutionaries	Entryist currents altered the internal balance of several parties and trained a generation in factional method
Trade union intervention	Organised fractions inside industrial unions	Disproportionate presence in particular strikes and union oppositions in the United States, Bolivia, France and elsewhere

The table’s two panels obey different logics, and the difference is instructive. The divisions were events, datable and documentable, each with its platform and its vote. The influence was a process, undatable at any single point, carried by books that outlived the factions that commissioned them, by teachers who had passed through the movement and out the other side, by union militants whose formation was Trotskyist and whose allegiances became their own. Organisations can be counted; processes must be traced. That is why the movement’s detractors, who prefer their evidence countable, exhibit the upper panel, and why its historians, who are obliged to trace, insist on the lower one. Any verdict that rests on only one panel is a verdict about half the subject.

Entryism: the tactic devised against isolation

Entryism, also written as entrism in much of the literature, is the practice by which a revolutionary organisation directs its members to join a larger party of the working class, there to win its radicalising members to the revolutionary programme. Trotsky proposed the original version, the French turn of 1934, after concluding that his French supporters, isolated in a small league while the socialist party absorbed a generation radicalised by the February riots in Paris, faced a choice between the audience inside the mass party and sterility outside it. The French Trotskyists entered the socialist party as an organised group with their own newspaper, argued for their positions in its internal life, were expelled within about a year, and emerged larger than they had entered. The episode established the tactic’s template and its expectations: entry was to be open rather than concealed, temporary rather than permanent, and directed at a party in motion rather than at a settled apparatus. The later history of entryism is largely the history of those three conditions being stretched, one by one, until critics inside the tradition itself asked whether the word still described the practice it named.

The governing discipline for understanding entryism is to treat it as a proposed solution to the second factor, isolation. An organisation too small to address the class directly borrows the audience of a larger one. The tactic’s internal logic is therefore defensive before it is anything else: it concedes that the independent organisation has failed to gather the audience its programme requires, and it trades the visibility of independence for the reach of immersion. That concession explains both the tactic’s genuine successes and its characteristic pathologies. Inside a mass party, revolutionaries met workers they could never have reached, learned the craft of factional politics at close quarters, and on several occasions shifted the balance of substantial organisations: entryist currents at various periods shaped the internal life of the Labour Party in Britain, of socialist parties in France and elsewhere, and trained cohorts of militants whose later careers ran through unions, campaigns and publishing. The pathologies arose when the sojourn lengthened. Members whose political lives were spent inside another party’s structures acquired loyalties, habits and careers there; the host party’s timetable displaced the guest’s programme; and the distinction between influencing an organisation and being absorbed by it blurred, until departure became unthinkable because departure meant starting again at the margin the tactic had been devised to escape.

Popular discussion of entryism is dominated by a misunderstanding that the record does not support: the picture of a concealed conspiracy, of sleepers and secret directives, owing more to the security imagination of the movement’s enemies than to its practice. The classical entries were announced. The French Trotskyists entered the socialist party publishing their programme and their intention to win it; the later deep entry debated in 1953 was argued in documents the whole movement could read; the entryist groups that worked inside the Labour Party at various times were known to its apparatus in detail and were fought, expelled and litigated against in the open. What was internal was the entrists’ own organisation, their caucuses and their press, and internal organisation is the common practice of every faction in every party. Describing the splits by issue and period rather than by present-day successor, the honest summary is that entryism was a stated strategy, publicly defended by its authors and publicly attacked by its opponents, whose real controversies concerned its duration and its price. Did immersion win the audience or lose the entrists? Did the years inside build the revolutionary party or defer it indefinitely? Those questions were the substance of the 1953 division and of several later ones, and they remain the right questions to ask of any small organisation weighing the same bargain, in any tradition.

What did entryism ask members to do in practice?

A member entering a host party took its card, attended its branches, sold its paper alongside the entrists’ own publications where rules allowed, argued for the revolutionary programme in its debates and accepted expulsion as a foreseeable cost. The entrant’s loyalty was declared to be temporary and instrumental: the host party was a field of work, never a home.

The tactic’s relation to the larger argument of this article should be marked explicitly. Entryism is the clearest evidence that the movement understood its own isolation as its central problem and experimented, repeatedly and at real cost, with institutional remedies for it. The experiments failed to cure the condition, because the condition was produced by the balance of forces in the class rather than by the movement’s choices, but the experimentation rebuts the caricature of a tradition content with its margins. Sections that practised deep entry did not experience themselves as guardians of purity; they experienced themselves as gamblers staking the organisation’s separate existence on the chance of an audience. The gamble’s mixed record, audiences won and organisations dissolved, converts neatly into the article’s general finding: where the tradition found real constituencies, its politics steadied and its disputes damped; where it did not, no tactic could manufacture the missing ballast, and doctrine reclaimed the stage. The comparison between the movement and the social democratic tradition it sought to enter, their programmes, their electorates and their divergent answers to the epoch, is pursued in marxism vs social democracy, which supplies the context entryism presupposes.

The influence trail: an economist, a biographer and a generation

Influence claims are cheap in movement literature, where every tradition discovers its own fingerprints on every event, so the claims made here are confined to cases where the chain of transmission can be shown: a named person, a named work, a documented reception. The strongest case is Ernest Mandel. A Belgian militant of the movement from his youth, a survivor of the occupation who had been deported to Germany for resistance activity, Mandel became after the war the International’s leading economist and the most productive Marxist economic writer of his generation in any tradition. His treatise on Marxist economic theory, published in French in 1962 and in English later in the decade, attempted what almost nobody else in the postwar decades attempted: a systematic restatement of the whole of Marx’s economic doctrine, extended to the economics of bureaucracy, of the arms economy and of the postwar boom, in engagement with the academic literature of several countries. His study of late capitalism, published in German in 1972, offered a periodisation of the postwar economy, long waves of expansion and contraction driven by the rate of profit and by extra-economic shocks, that entered debates far beyond the movement’s readership and is still assigned, cited and argued with in the scholarly literature of Marxian economics. Mandel lectured at universities, debated academic economists in print, advised trade union research departments and wrote on everything from the economics of the European Community to the detective novel. When obituaries appeared in newspapers that had never printed the name of his International, they treated him as a major figure of European intellectual life. The disproportion is the datum: a functionary of a small and divided movement became, by the quality and volume of his work, an unavoidable reference in his field.

The movement’s economic contribution is worth pausing over because it inverts the usual story of sectarian sterility. The theoretical economics of the postwar decades was dominated, on the Marxist side, by writers formed in or near this tradition to a degree that surprises readers who meet the names first in university bibliographies. Mandel’s work is the summit, and the slopes are populated: economists who reconstructed the theory of the falling rate of profit, historians of the long waves of capitalist development, analysts of the permanent arms economy whose arguments about military spending and the boom began as the movement’s internal doctrine and entered general debate. Readers who want the economic theory itself, its categories and its controversies, set out in full should follow marxist economics complete guide, which carries the subject further than a survey of one tradition’s contributors can.

Isaac Deutscher presents the second case, of a different kind. A Polish journalist who had passed through the Communist Party, been expelled as an oppositionist and settled in London, Deutscher never belonged to the Fourth International in any settled way and stood in an independent, sometimes critical relation to its organisations. Yet his three-volume biography of Trotsky, The Prophet Armed, The Prophet Unarmed and The Prophet Outcast, published between 1954 and 1963, did more than any organisational act of the period to shape the English-speaking world’s understanding of the Russian Revolution and its exiled leader. Deutscher wrote with a literary power the movement’s own writers rarely matched and with an independence that let him criticise his subject while restoring his stature, and the trilogy became the standard account, debated by every subsequent biographer and absorbed by readers who had no other contact with the tradition. His biography of Stalin and his essays on the revolution’s aftermath travelled the same road. The case refines the article’s method: influence is measured where it travelled, and it often travelled through figures at the tradition’s edge rather than through its apparatus, men and women formed by its questions who answered them at a distance from its discipline. A tradition’s intellectual perimeter is larger than its membership and frequently more durable.

How did Isaac Deutscher shape Trotsky’s reputation in English?

Deutscher’s trilogy combined archival labour, narrative power and an independence of judgement that neither hagiography nor dismissal could match, and it appeared when the Cold War had made its subject a propagandist’s effigy. Reviewers across the spectrum treated the volumes as the authoritative life, and later biographers, friendly or hostile, have been obliged to argue with Deutscher’s Trotsky ever since.

The third case is collective. The generation that made the new left of the nineteen sixties encountered Marxism through channels the tradition had kept open during the decades when the doctrine was otherwise the property of Communist parties or of antiquarian scholarship. The movement’s journals, its publishing houses and its habits of internal education had preserved a Marxism that was anti-Stalinist by constitution, and when a student generation went looking for a revolutionary doctrine untainted by the Soviet record, the Trotskyist tradition was one of the few suppliers with stock on the shelves. In Britain the lineage of a major theoretical journal of the left ran through editors and contributors formed in or around the movement, and the journal’s celebrated engagements with cultural theory and historiography carried the formation into fields the movement itself never entered. In France the movement’s student organisations were a visible presence in the events of 1968, its spokespeople known to a national audience. In the United States its veterans moved through the civil rights and antiwar movements as organisers and writers. The formation’s full history belongs to new left marxism explained; the point required here is narrower. A movement is influencing events when people who will never join it think with its tools, and by that measure the tradition’s postwar influence was out of all proportion to the numbers its sections could parade.

The national exception: the Lanka Sama Samaja Party

One case stands apart from every other in the tradition’s history, because it answers the question the movement’s enemies treat as rhetorical: what happened when a party of this tradition became strong? In Ceylon, the Lanka Sama Samaja Party, founded in 1935 by a remarkable generation of activists educated partly in Britain and the United States, among them N. M. Perera, Colvin R. de Silva and Leslie Goonewardene, became the principal party of the island’s left and at times the principal opposition in its parliament. It led the great hartal of 1953, a general strike and protest movement against price rises that shook the government of the day; it built unions among transport workers, municipal employees and the plantation labour force; it published in Sinhala, Tamil and English; and it sat inside the Fourth International as one of its most substantial sections, a mass party where other sections were circles. The Ceylonese experience is the control experiment for the article’s argument. Here was the same doctrine, the same founder’s texts, the same international affiliation, carried by an organisation with a real constituency, and the predicted fragmentation did not occur on the European pattern: the party’s internal disputes were serious and occasionally bitter, but they were damped for decades by the discipline of mass responsibility, by elections to fight and unions to lead and a public that punished frivolity. Structure, not culture, is the variable that changes.

How did the Lanka Sama Samaja Party become a national force?

The party grew from anti-colonial agitation into a mass organisation by building unions, publishing in the island’s three languages and leading the resistance to the cost of living rises that produced the hartal of 1953. Electoral success made it the main party of the left, and its leaders became national figures with ministerial careers ahead of them.

The sequel is as instructive as the rise. In 1964 the party entered a coalition government led by the Sri Lanka Freedom Party, accepting ministerial office, with Perera becoming Minister of Finance, under a programme its critics inside the International judged to be the administration of capitalism rather than its supersession. The United Secretariat expelled the party, the only occasion on which a section of that size was cast out, and the expulsion was defended on the ground that entry into a bourgeois coalition crossed the tradition’s founding line between independence and class collaboration. The expelled party’s defenders answered that the International, a body whose other sections could only dream of ministerial office, had applied a doctrine of purity to a situation of power it had never faced itself, and that the coalition was the road its electorate had chosen. Both arguments are recognisable applications of the tradition’s principles, which is the point: the doctrine supplied no verdict both sides were bound to accept, and so the International lost its strongest section over the one question its European experience had never posed in practice. The national exception thus confirms the three-factor account from the opposite direction. Mass responsibility had protected the Ceylonese party from fragmentation for three decades. What it could not protect the International from was the doctrinal test applied at the summit, where a centre without a constituency judged a section with one, and judged it by the text.

The comparative moral extends beyond one island. Wherever the tradition acquired mass anchors, among Bolivian miners whose unions the movement’s militants helped to lead, in the American transport unions of the nineteen thirties whose strikes its cadres had organised before the International existed, its behaviour approximated that of other mass movements: argumentative, factional at intervals, but coherent across decades. Wherever it lacked them, the three factors operated undamped. The movement’s tragedy, in the strict sense of a flaw unfolding from its constitution, is that its founding analysis taught it to expect mass anchors everywhere and soon, and its actual history delivered them in a handful of places for limited periods, leaving the organisational machinery designed for millions in the hands of thousands. A smaller expectation might have built institutions fitted to the real scale, looser, more federal, more tolerant of internal plurality. The tradition could not choose that path without ceasing to be itself, because the expectation of imminent mass responsibility was not an ornament on the doctrine. It was the doctrine’s core claim about the epoch, renewed in every congress resolution, and it is a fair summary of the whole story that the movement was undone less by its errors than by the structural consequences of its central conviction.

Why the movement stayed small

Smallness, like fragmentation, is usually explained by insult: the doctrine was absurd, the people were cranks, the thing was a cult. Insult is not analysis, and the comparative record disposes of it. The nineteen thirties and forties offered a crowded marketplace of revolutionary doctrines, several of them no more plausible on their face, and some competitors grew to millions while the Fourth International did not. The difference lies in the conditions each doctrine required. The Communist parties grew behind a state, with its treasury, its prestige and its apparatus, and behind the resistance credentials of the war. The social democratic parties grew inside the institutions of the welfare settlement, administering real improvements in their members’ lives. The Fourth International offered a critique of both machines and a programme whose realisation required the prior collapse of both, in societies where the machines were delivering, for a generation after the war, rising wages and full employment. A doctrine that predicts the imminent breakdown of an order visibly improving its subjects’ material lives recruits from a narrow stratum: the far-sighted, the desperate and the young. The movement recruited from all three, in about that order of durability, and its size is the arithmetic of its market.

Timing compounded the market’s narrowness. The International was founded at the worst imaginable moment for a European organisation: on the eve of a war that physically destroyed its continental sections, decapitated its leadership and severed its communications for six years. Organisations founded in 1945 began where the Fourth International had to begin again, without its burden of prewar defeats and without its founder’s corpse. The war also settled the question of the epoch in a sense opposite to the founding analysis. Capitalism emerged from the war not in its death agony but at the start of the longest boom in its history, and the working classes of the West entered a generation of rising consumption that made the transitional demands read, to most of their intended audience, as answers to problems already being solved by other means. The movement’s response to the boom displays its characteristic machinery once more. Where the analysis of long waves associated with Mandel treated the boom as a phase with determinate causes and a foreseeable end, a genuine attempt to think the new reality with the tradition’s tools, cruder readings treated the boom as a postponement and waited for the schedule to reassert itself. Waiting is a viable strategy for a church. For an organisation whose identity is a timetable, waiting corrodes: each year of delay must be explained, and the explanations are internal events, conducted by the doctrinal means at hand, with the fragmentation machine idling and ready.

Competition from the unexpected was a further constraint that purely internal accounts neglect. The revolutions that did occur in the postwar decades, in China, Vietnam and Cuba, were made by movements whose doctrines were variants of the very Stalinism the Fourth International existed to oppose, or by national movements of a kind its categories struggled to place. Each such revolution redrew the map of the possible for the audiences the Trotskyists sought. A young militant in Paris or La Paz in 1960 who wanted to make a revolution could look at parties that had actually made them, however exacting the doctrinal price, or at an International that promised a purer article at an unspecified date. That many chose the existing revolutions, or the guerrilla strategies modelled on them, is not a judgement on their intelligence; it is a judgement on the credibility that success confers and failure withdraws. The movement understood the mechanism and named it in its own vocabulary, the pressure of alien class forces, but naming the weather does not repeal it. Its sections in Latin America, where the Cuban example was a living presence, spent the nineteen sixties arguing over armed struggle with an intensity that split several of them, an argument conducted, characteristically, as an exegesis of the founder’s writings on war and insurrection, texts written for the Russia of 1917 and the Spain of 1936, applied to the Bolivia of 1967 by men and women who knew the application was strained and had no other authority to appeal to.

The movement’s smallness was finally self-reinforcing in a way familiar from the sociology of sects, though the word should be used without its sneer. A small organisation with high demands on its members offers intense compensations: a total interpretation of the world, a community of the convinced, a literature, a history, an enemy and a mission. Those compensations retain the convinced and repel the merely sympathetic, and they select recruits who value doctrinal exactness, who then staff the apparatus that guards the exactness, which raises the demands further. Sociologists call the process a deviance amplification loop, and it operates in religious movements, in artistic schools and in academic factions as reliably as in politics. The Fourth International’s version of the loop had a distinctive feature, however, which returns the analysis to its starting point: the loop was periodically interrupted by the real world. Wars, strikes, uprisings and elections broke into the seminar and conscripted its members into mass activity for which their formation had prepared some of them superbly. The interruptions are the reason the tradition’s record cannot be written as pure sectarian decay. It kept producing people whom events could use, and the using of them, in unions, in universities, in the press and in one country’s government, is the lower panel of the table and the substance of the legacy.

What did the founders expect, and what happened instead?

The founders expected the approaching war to end in revolutionary crises across Europe, the collapse of the old leaderships and the growth of the new International into a mass force within years. War came and crises came, but the beneficiaries were the established parties and new forces outside the tradition, while reconstruction and boom postponed the expected reckoning indefinitely.

Expectation deserves a fairer hearing than hindsight usually grants it. The founders of 1938 had watched the previous war end with revolutions in Russia and Germany, mutinies in fleets and armies, and the collapse of four empires; they had watched the nineteen thirties deliver fascism where revolution failed. Their extrapolation, that the second war would repeat the first war’s revolutionary sequel with the leadership question now answered in advance, was wrong, but it was not foolish, and versions of it were held by chancelleries and general staffs that planned for exactly the upheavals the Trotskyists expected. What the founders failed to foresee was the capacity of the postwar settlement, American credit, welfare institutions, Communist parties integrated into national reconstruction, to convert the war’s end into a new stability. The failure of foresight was general; the punishment for it was particular, because the Fourth International had staked its institutional design on the forecast. A movement that builds a general staff for an imminent war, and gets thirty years of armed peace and consumer capitalism instead, spends those years explaining the discrepancy to itself, and the explanations are its history.

How the influence should be measured

The measurement of influence is the point at which writing about this tradition usually degenerates into assertion, admirers listing names and enemies demanding membership figures as though the second refuted the first. A disciplined treatment needs criteria, and the criteria used in this article can be stated and then applied. Influence is present, first, where identifiable people carried the tradition’s formation into fields beyond it and left documented work there: Mandel in economics, Deutscher in historiography, editors and writers in the journals of the new left. It is present, second, where identifiable practices travelled: the transitional method’s descendants in the demand strategies of later movements, entryism as a named and debated technique in the literature of party politics, the internal education systems and cadre schools that other organisations copied from the movement’s example. It is present, third, where institutions bear the mark: a major theoretical journal’s lineage, publishing houses that kept a non-Communist Marxist literature in print through decades when no commercial publisher would, archives that preserved the record of the Russian opposition for a scholarship that eventually used them. And it is absent where the tradition’s literature claims it without the chain: the habit of crediting the movement with every strike its members attended and every radicalisation its papers welcomed is hereby declined. The influence that survives the criteria is smaller than the publicists’ version and far larger than the mockers’, and it has a distinctive shape: it is concentrated in the production of ideas and of people who produce ideas, and thin to vanishing in the direct government of events, the one national case apart.

How should influence be measured for a small movement?

Membership counts the convinced; influence must be traced through transmissions that can be documented. A small movement is influential where its trained people, its texts and its techniques appear inside larger formations and leave work that outlasts the contact: books still cited, journals still published, methods still practised by people who may never have carried its card.

That standard also disciplines the article’s treatment of the movement’s afterlife in the universities. From the nineteen seventies, academic Marxism expanded rapidly in the Anglophone world and beyond, and the tradition’s contribution to that expansion is real but indirect, which is exactly the kind the criteria are designed to handle. The movement had kept in print, through its own publishing ventures and sympathetic houses, texts of Marx and of the classical Marxists that the academy had neglected; it had trained translators, editors and commentators; and when the universities opened their doors to Marxist scholarship, a portion of the new field’s working library and some of its working scholars arrived from the movement’s side of the wall. The indebtedness was rarely acknowledged and sometimes actively denied, since an academic career was not advanced by a Trotskyist formation, and the historian of the transmission must work from correspondence, memoirs and the evidence of the texts themselves. But the traffic also ran the other way, and honesty requires the admission: the movement’s intellectuals were sustained in their later decades by university posts, publishers and readerships the academy provided, so that the tradition’s survival as an intellectual force was partly a gift of the institution it regarded as a bourgeois ornament. Influence, unlike purity, is a relation, and relations have two ends.

A second field where the chain of transmission is documentary rather than rhetorical is the historiography of the Russian Revolution itself. For decades the dominant Western accounts were written within the assumptions of the Cold War, and the Soviet accounts within the assumptions of the regime, and between them the record of the opposition, of the debates of the nineteen twenties, of the alternatives the revolution contained, was preserved substantially by the tradition this article describes: in its journals, in its publishing of the founder’s writings and documents, in the archives its exiles deposited in Western libraries. When a later generation of historians, social historians of the revolution working in archives opened after 1991, reconstructed the period’s genuine plurality of voices, they worked in part on materials the movement had saved from the furnace and the police warehouse. Preservation is an unglamorous form of influence, easily missed by criteria that look for power, and it may in the end be the tradition’s most consequential service to a culture larger than itself: it kept the evidence. Movements are usually judged by what they built. This one should also be judged by what it refused to let be destroyed, the record of a revolution’s internal argument, without which the twentieth century’s central event would be known only through the versions of its victors and its enemies.

The influence on political practice, beyond ideas, is harder to certify and should be claimed with restraint. Trotskyist militants were present, sometimes prominently, in strikes and union oppositions across several countries and decades: in the maritime and transport unions of the United States, in the tin miners’ federation of Bolivia whose programme of 1946 bore the transitional method’s unmistakable imprint, in the French strikes of the nineteen fifties and in the factory occupations of 1968, in the British miners’ struggles where entryist and independent currents of the tradition both worked. Presence is not command, and the tradition’s literature has often elided the difference. The defensible claim is that the movement functioned, in the industrial field, as a supplier of trained and stubborn cadres to struggles larger than itself, a staff college whose graduates served in other people’s armies, and that some of those armies were glad of them. The pattern repeats the article’s central finding at the level of practice: the tradition’s products travelled, its flag mostly did not.

The rival claimants and the meaning of the inheritance

A question that puzzles outside readers, why several organisations should each call themselves the Fourth International or its continuation, dissolves once the asset in dispute is identified. The inheritance is not property, premises or funds, which are negligible. It is a claim about history: that the founding conference of 1938 established the legitimate leadership of the world revolutionary movement, that the claim descends through fidelity to the founding programme, and that the organisation which preserves the programme in its integrity holds the succession in the way a church holds apostolic continuity. Under those rules, schism does not divide the asset; it multiplies claimants to it, because each departing body departs in the programme’s name and experiences its own separation as the moment the others forfeited the succession. The pattern is unintelligible to anyone who expects organisations to behave like firms competing for market share, and entirely intelligible to anyone who has watched a religious tradition handle a contested scripture. This article describes the rival claimants without adjudicating legitimacy, for a principled reason: the criteria by which legitimacy could be adjudicated are themselves the disputed property. An outside account that awarded the succession to one claimant would not be reporting the tradition; it would be joining it.

The denominational structure has consequences that reach beyond nomenclature. Because each claimant teaches the same founding texts through its own commentary, the tradition exists for its students as several parallel canons, and a recruit’s formation depends heavily on which door was nearest when conviction arrived. Because the claimants compete for the same narrow pool of the convinced, their polemics against one another are frequently more elaborate than their polemics against the order of things, a distribution of energy that outsiders mistake for the whole of the tradition’s activity and that insiders periodically lament in internal documents of real self-knowledge. And because the succession is the asset, reunifications are theologically expensive: a merger requires at least one claimant to concede that its separate custody was not, after all, the sole thread of continuity, which is why the partial reunification of 1963 remains the exception in a history of fissions. Students of the movement learn to read its organisational chart the way historians of religion read a table of sects, as a map of doctrines in institutional form, each body embodying a verdict on some question, the Soviet Union, entry, the national question, the character of the postwar regimes, that the others answered differently.

It is worth pausing on the word legacy in the article’s title, because the tradition’s own understanding of it differs from the historian’s. For the claimants, the legacy is a trust: a programme received, to be transmitted unimpaired, and the trustee’s virtue is fidelity. For the historian, the legacy is an effect: what the movement actually did to the world around it, intended and unintended, which includes the fragmentation, the expulsions, the wasted energies and the personal wreckage alongside the books and the cadres and the one ministry of finance. An honest account must hold the two meanings apart and report both. By the trustee’s standard, several organisations can each claim success and the claim cannot be externally tested. By the historian’s standard, the movement’s effects are mixed and traceable, and the rest of this article, the objection included, is written to that standard. Confusing the standards is the commonest error in the literature: publicists grade the movement by fidelity and call the grade history, while enemies grade it by its failure to seize power and call the grade a refutation of its ideas, and neither grade describes the legacy as the world received it.

The strongest objection, stated at full strength

The objection to everything claimed so far deserves its strongest statement, in the words its most serious proponents would choose. A movement has existed for the better part of a century. It has never led a successful revolution. It has never formed a government, and its single experience of office, as a junior partner in one island coalition, ended in its expulsion by its own International for the crossing of its own red line. It has split more often than it has grown, and its splits have consumed the energies of generations of able people whose talents, spent elsewhere, might have built unions, parties, journals and movements of measurable effect. Its founding predictions failed. Its central doctrinal questions proved undecidable. Its method for converting demands into power was never once carried through to the end it advertised. On the movement’s own declared criteria, the verdict is not ambiguous: the Fourth International is a case study in the failure of a political method, and the elaborate structural explanation of that failure offered in this article is an embroidery on a simple fact, that the method did not work and its adherents could not admit it. The influence trail, on this reading, is a consolation prize assembled from the biographies of talented individuals who would have written their books under any flag, and the structural factors are an alibi: other movements faced repression, defeat and doctrinal dispute in the same century and built mass organisations anyway.

That objection is partly right, and the part that is right should be conceded without varnish. On the movement’s own stated objectives, the record is one of failure, and this article’s account has not concealed it: the general staff never got its army, the timetable never ran, and the organisation founded to supersede the old Internationals was outlived in influence by both of the traditions it sought to replace. The concession matters because a defence that begins by denying the scoreboard deserves no hearing on anything else. Where the objection overreaches is in its two inferences. The first inference, that the talented individuals would have produced the same work under any flag, is contradicted by the work’s content: Mandel’s economics is unthinkable without the tradition’s questions, its education system and its assignment of value to theoretical labour; Deutscher’s trilogy is a product of the opposition’s standpoint, its archives and its quarrel; the new left’s anti-Stalinist Marxism was not an atmosphere but a transmission, with carriers who can be named. Formation is a cause, and a movement that forms people is doing something real even when it does nothing else. The second inference, that structural explanation is an alibi excusing the method, mistakes the purpose of explanation. To show that specified conditions reliably produce fragmentation is not to excuse the doctrine that chose to operate under those conditions while demanding more of them; if anything the analysis sharpens the indictment, by locating the failure not in the stars or in Stalin’s police but in the movement’s own constitution, in choices about organisation and doctrine that were renewed at every congress by people free to choose otherwise. Explanation and acquittal are different operations, and confusing them is the objector’s error, not the analyst’s.

The comparative clause of the objection, that other movements built mass organisations under the same century, also cuts two ways when it is examined. The mass organisations of the century were built by movements that commanded a state, or administered welfare institutions, or embodied a nation’s resistance, assets the Fourth International never possessed and could not have acquired by better internal arrangements. The honest comparison class for the Trotskyist tradition is not the Communist and social democratic giants but the century’s other stateless doctrines of total transformation, anarchism in its several forms, the revolutionary syndicalisms, the council communisms, the dissident Marxisms of every shade, and measured against that class the tradition’s record is not the worst but among the most durable: it alone among the founder-centred currents of the nineteen thirties preserved a continuous international organisation, a publishing apparatus, a school of economists and historians and a presence, however modest, on five continents across the whole period. Durability is not victory, and the movement would have traded all of it for one successful revolution, but durability on that scale is a fact requiring explanation, and it is explained by the same features that explain the fragmentation: a doctrine definite enough to be worth fighting over, an education serious enough to form people who could carry it into other fields, and an organisation demanding enough to hold its members through defeats that dissolved looser bodies. The three-factor fragmentation and the outsized influence are not two facts in tension. They are one fact with two faces, the output of a single constitution: maximum doctrinal definition, minimum material resource. What that constitution could not do was the thing it was for. What it could do, it did for eighty years.

Reading the record whole

A reader who has followed the argument this far is in a position to handle the movement’s literature, including its own histories, with the right instruments. The first instrument is the distinction between the founding aims and the later record. The aims were maximal: a world party of socialist revolution, superseding the discredited Internationals, leading a class to power within a historical interval the founders measured in years. The record is the record: small organisations, real influence of a specific kind, one national exception, a library. Neither the aims nor the record should be used to grade the other in a serious account. The aims explain the institutions, the morale and the pathology; the record shows what the institutions in fact produced; and the gap between them is the subject, which is why hagiography and mockery, each of which suppresses one term of the gap, are equally useless as guides. The second instrument is the distinction between the movement’s theory and its organisational fate. The theory, of permanent revolution, of the degenerated workers’ state, of the transitional method, stands or falls by argument and by evidence in the usual way, and much of it has been absorbed, often without attribution, into the common stock of Marxist and even of non-Marxist analysis: the idea that democratic and socialist tasks intertwine in the developing world, the analysis of bureaucratic strata in planned economies, the strategy of demands that bridge present consciousness and systemic conclusions. The organisational fate is a separate ledger, governed by the three factors, and it neither vindicates the theory, as the publicists claim when they point to survival, nor refutes it, as the mockers claim when they point to the splits. Keeping the ledgers apart is the discipline this series applies to every school it examines, and no school needs it more than this one, whose partisans and enemies conspire to merge them.

The third instrument is a sense of what the tradition is for a student of politics quite apart from its own claims. The Fourth International is the most completely documented small movement of the twentieth century: its internal bulletins were voluminous, its factions published their platforms, its correspondence survived in quantity, and its members wrote memoirs with a candour their enemies found useful. For the study of how organisations behave under stress, how doctrines are transmitted and deformed, how charismatic authority routinises into textual authority, how exiles sustain a politics across continents and how a movement’s theory of the world processes the world’s refusal to comply, the archive of this tradition is a laboratory with few equals. Universities teach the sociology of religion from smaller bodies of evidence. That scholarly utility is part of the legacy too, and it has the paradoxical quality that the movement’s value to people who share none of its aims may outlast its value to those who share all of them. The founders intended to be studied the way generals are studied, as makers of events. They are studied instead the way theologians are studied, as makers of arguments and institutions, and there are worse fates for the defeated of the twentieth century than to remain, in that form, unavoidable.

For the practical business of keeping such a record straight, names, dates, documents and their relations, a structured study system repays its cost quickly, and the companion notes at VaultBook are built for exactly the kind of source mapping this subject demands, where a single split may need to be followed through platforms, bulletins and memoirs held in four languages. The habit such a system enforces, separating the document from the commentary and the claim from the claimant, is the habit the whole article has tried to practise.

The war years and the reconstitution

The movement that emerged from the Second World War was not the movement that had entered it, and the difference is a study in what repression does to an organisation’s memory. The founding generation had been formed in the debates of the nineteen twenties; the generation that rebuilt the International after 1945 had been formed in clandestinity, in prison, in exile and in the resistance movements of occupied Europe, and it carried the habits of those formations into the movement’s peacetime life. Conspiratorial competence, the vetting of contacts, the suspicion of correspondence, the cellular structure of work, were assets in 1943 and encumbrances in 1948, when the tasks were the open ones of publication, recruitment and trade union work. Organisations, like armies, are shaped by the war they last fought, and the Fourth International spent its first postwar decade shedding wartime reflexes unevenly, some sections adapting to legal existence with speed and others preserving the underground’s manners long after the police had lost interest. The unevenness fed the internal arguments, because a difference of habit presents itself, inside a doctrinal movement, as a difference of principle, and is argued in those terms.

The reconstitution also posed the movement’s sharpest theoretical emergency. The war had ended with the Soviet Union enormously expanded in territory and prestige, with regimes on its model installed across Eastern Europe, and with Communist parties leading resistance movements in Yugoslavia and China toward victories of their own. The founding analysis had classified the Soviet bureaucracy as a parasitic caste incapable of extending the revolution, a doomed excrescence on property forms it would ultimately betray to capitalist restoration. Events had instead shown the bureaucracy, and parties of its type, expropriating capitalists across a third of Europe and Asia. The movement faced a choice between revising the analysis and reclassifying the events, and, characteristically, it did both in different places, which is to say it split in slow motion across the following decade. The majority of the International Secretariat classified the new regimes as workers’ states of a deformed kind, created by bureaucratic and military means rather than by proletarian revolution, and drew the conclusion that the bureaucracy could, under the pressure of history, carry out expropriations while remaining a bureaucracy. Minorities in several countries concluded instead that the events proved the bureaucracy a new ruling class building a new exploitative order, and developed the state capitalist or bureaucratic collectivist analyses into complete alternatives. The argument was never scholastic in intention. It determined what the sections said about the largest political fact of the age, whether they defended the new regimes against the West, attacked them as new oppressions, or attempted the founding position’s difficult third road of defence against imperialism combined with a call for political revolution. Each answer aligned the movement differently toward the Communist parties it competed with and toward the cold war that structured every political conversation of the period.

How did the movement survive the war years at all?

Survival rested on geography and on print. Sections in the Americas operated legally or nearly so and preserved the centre’s correspondence, while European militants maintained clandestine papers and links under occupation at heavy cost. After the war the surviving networks reassembled around the journals and publishing houses, which carried continuity when organisation charts could not.

The human material of the reconstitution deserves a paragraph of its own, because the movement’s postwar character was set by an unusual recruitment pattern. Into the rebuilt sections came young people radicalised by the war and the resistance, students of the expanding universities, colonial students in the metropolitan capitals who would carry the doctrine to Asia and Africa, and, in several countries, workers formed in the great strike waves that accompanied reconstruction. The Ceylonese party was rebuilt as a mass force in those years; the Bolivian section grew inside a miners’ movement of extraordinary militancy; Vietnamese militants rebuilt in exile in France the networks the 1945 catastrophe had destroyed at home. The International of 1948, which held a second world congress in Paris, was in personnel a new movement wearing an old programme, and the tension between the programme’s prewar categories and the new members’ postwar world is the deep background of the 1953 crisis, whose ostensible subject was strategy and whose real subject was whether the centre in Paris or the sections in their countries would interpret a world neither had predicted.

That congress and the ones that followed also illustrate the centre’s chronic problem in material form. A world congress of the Fourth International was an assembly of dozens, financed with difficulty, conducted through interpreters, its delegates in several cases unable to travel on their own papers. Its resolutions, drafted to govern sections on five continents, were necessarily written at a level of generality that transferred the real decisions to the argument about application, which is to say to the sections and to the factions. The Communist International in its strength had governed by cable, emissary and subsidy, instruments its successor never possessed; the Fourth International governed by text, and government by text is government by interpretation, and government by interpretation is an invitation to every gifted reader to found a church. The analysis returns always to the same junction: doctrine as the sole asset, organisation as the sole enforcement mechanism, and the two in permanent disproportion.

The postwar revolutions and the doctrinal tests

Each postwar revolution administered the same examination in a new paper, and the movement’s answers accumulated into its modern doctrinal map. Yugoslavia came first in the order of shock, because there a Communist party had made a revolution substantially by its own forces and then, in 1948, had broken with Moscow and begun experimenting with forms, workers’ councils and decentralisation, that the Trotskyist tradition had demanded for the Soviet Union itself. The International’s first responses veered between enthusiasm and the suspicion that the break was a manoeuvre, and the veering discredited the centre with sections that had partisans in both directions. China followed, a revolution led by a peasant army under a party the movement had classified for two decades as an instrument of the bureaucracy, and the classification of the resulting state divided the movement for a generation: the majority eventually recognised a deformed workers’ state, while minorities held to state capitalist or other readings, and the argument replicated itself in miniature inside sections on every continent. Cuba posed the question in its most acute form because the revolution there was made by a movement that was not Communist at all, which expropriated capital, defied the United States and declared itself socialist in the course of a process the movement’s categories had not foreseen, and the majority of the International greeted the outcome as confirmation that revolution in the colonial world would grow over in the manner the theory of permanent revolution described, whoever held the leadership at the start. That greeting, and the convergence it produced between the two wings of the 1953 division, made the reunification of 1963 possible, as noted in its place. Algeria supplied the occasion for a different kind of contribution, less doctrinal than practical: militants of the tradition worked in the networks supporting the Algerian independence struggle inside France itself, at real personal risk, carrying funds, papers and people for a revolution that was not theirs, and the record of that solidarity, documented in trials and memoirs, stands among the honourable pages of the movement’s history.

The cumulative effect of these examinations on the movement’s internal life can now be stated in the terms of the three factors. Doctrine supplied the questions, each genuinely open and each with the largest practical stakes. The centre’s remoteness, a product of repression and war, ensured that its answers arrived as texts competing with the sections’ direct experience. And isolation ensured that the ensuing disputes could not be dissolved in common mass work, because the events in dispute were happening in other people’s countries and the sections’ shared work was the dispute itself. It is no accident that the movement’s most durable unities were achieved around causes where its members worked together physically, in solidarity campaigns, in union fractions, in the production of a journal, and its most corrosive divisions around judgements of distant revolutions that its members could only read about. The sociology is generalisable and the movement’s historians, to their credit, often state it plainly: organisations divided by interpretation unite by practice, and a movement deprived of practice will be governed by its interpretations, which is to say by its divisions.

The doctrinal tests also had a ratchet effect on the tradition’s intellectual development that deserves recording, because it pushed the movement’s best minds toward the work that constitutes much of the lower panel of the table. A tradition whose central questions cannot be settled by events is driven, if it is serious, toward deepening the theory that frames the questions, and the postwar decades saw exactly that deepening: Mandel’s reconstruction of Marxist economics, the long wave theory of capitalist development, extended analyses of the bureaucracy’s economics, histories of the Russian Revolution and of the international movement written to archival standards. The sterility and the fertility had the same root. Cut off from the power that would have settled its disputes by success, the movement intellectualised them, and the intellectualisation produced work that outlasted the disputes and entered the general culture. Readers of the movement’s internal polemics often ask where the energy went. A fair part of it went into the footnotes of the modern scholarship of Marxism.

High moments and the pattern they reveal

Twice in the postwar decades the movement stood close enough to great events to test its formation at scale, and the two episodes belong in any balanced account because they show what the tradition’s cadres did when the audience finally appeared. In France in May and June 1968, a student revolt ignited a general strike of ten million workers, the largest in the history of the advanced capitalist world, and the organisations of the Trotskyist tradition, which had spent the preceding years building student and youth movements of real size, found themselves for some weeks at the centre of the largest audience any of them had ever addressed. Their spokespeople were known nationally; their papers sold in quantities their printers struggled to meet; their veterans sat in occupied faculties beside a generation that had learned its Marxism substantially from the channels described earlier in this article. The movement did not lead the strike, whose initiative lay with the workers themselves and whose settlement was negotiated by the established unions, and its organisations were dissolved by government decree in the aftermath, a compliment of a kind. But the episode demonstrated, against the caricature of the tradition as a reading circle, that its cadres could operate in a mass crisis with energy and competence, and it recruited the cohort that dominated the French movement for the next thirty years. In Portugal in 1974 and 1975, after the dictatorship collapsed, the tradition’s Portuguese organisations, built in exile and clandestinity, grew with similar speed amid a revolutionary process that put workers’ commissions, soldiers’ assemblies and land occupations on the European agenda for the first time in a generation, and the International’s sections across Europe treated the Portuguese events as the examination their whole formation had prepared for, pouring in organisers, money and print.

The pattern both episodes reveal is consistent with the analysis of the smallness problem. Given a crisis, the tradition could grow fast, because its doctrine was designed for crises and its cadres were trained for audiences in motion. What it could not do, in either case, was convert the crisis growth into durable mass organisation once the crisis subsided, because the surrounding conditions that had kept it small reasserted themselves: the established parties recovered their authority, the boom’s successor arrangements restabilised expectations, and the movement’s swollen ranks thinned to a larger but still modest residue, carrying new disagreements contracted during the expansion. Growth in crisis and contraction in calm is the rhythm of many movements; the Trotskyist peculiarity was to possess a theory that interpreted the contraction, once again, as a failure of leadership and application, generating the internal tribunals that consumed the residue’s energy. A movement that interpreted its rhythm sociologically, as the product of its niche, might have husbanded the residue and consolidated between crises. The founding doctrine forbade the interpretation, because the doctrine held that the crisis of the epoch was permanent and the only variable was leadership. The three factors are visible together in the single mechanism: doctrine supplied the interpretation, isolation deprived the interpretation of correction, and the repression-forged habit of treating internal opponents as the explanation of defeat turned the interpretation into discipline cases.

Why did Cuba divide the movement less than Eastern Europe had?

Cuba’s revolution arrived through a leadership outside the Communist parties, expropriated capital under mass pressure and defied the United States, so partisans of the rival centres could each find their expectations partially fulfilled. Eastern Europe’s regimes had arrived behind an occupying army, which forced a harsher choice between defending bureaucratic expropriation and condemning it outright.

Against the background of those high moments, the movement’s quieter decades read differently than the mockery suggests. Between crises, the sections did the unglamorous work of the labour movement’s left margin: shop steward organisation, strike support, defence campaigns for victimised militants, the editing of union bulletins, the slow education of cohorts of workers in meeting procedure, leaflet writing and the reading of balance sheets. That work left few monuments, because its products belonged to the unions and campaigns it served, and it is systematically undervalued in accounts of the tradition, including sympathetic ones, because it cannot be tabulated as influence without the elision between presence and command that this article has declined. It belongs in the record anyway, as the practical substratum that distinguishes the tradition from a purely literary sect. A movement whose members spent their evenings for decades in branch rooms and picket lines was doing something other than guarding a text, whatever else it was also doing, and the generations of trade unionists who passed through its ranks carried its habits of argument and organisation into institutions that never bore its name.

The apparatus of survival: press, schools and archives

No account of the legacy is complete without the machinery by which a small movement reproduced itself across three generations, because the machinery is where the influence was manufactured. The first machine was print. The tradition published at a scale absurdly disproportionate to its membership: daily and weekly papers in several countries, theoretical journals of genuine standing, publishing houses that issued the classical texts of Marxism in cheap editions and in translation, and internal bulletins whose volume constitutes one of the great unedited archives of twentieth century politics. Print was the movement’s territory, the ground where its resources of literacy and discipline outweighed its poverty, and it used that territory strategically, keeping in circulation through the coldest decades of the Cold War a Marxist literature that neither Communist orthodoxy nor commercial publishing would supply. When the political weather changed, the backlists were there. Several of the century’s standard translations and editions of Marxist classics exist because a Trotskyist publishing venture commissioned them for a readership of hundreds and the centuries kept them.

The second machine was education. The movement schooled its cadres with a seriousness borrowed from the early Communist parties and sustained long after those parties abandoned it: residential schools, correspondence courses, reading circles with set texts and examinations of conscience conducted as study of the classics. The product was a recognisable human type, the movement intellectual of working class or student origin, at home in the literature of three revolutions and in the minutes of a union branch, and the type proved exportable. Journalists, academics, union researchers and publishers across several countries began in that school, and the movement’s alumni network, though it has no directory and acknowledges no name, is one of the channels through which its influence flowed into the general culture. That the school also produced the tradition’s factional virtuosi, debaters who could sustain a platform fight across a weekend on the documentary record of 1923, is the same fact viewed from the other side: education in a closed canon produces scholarship and scholasticism in proportions set by the openness of the surrounding world.

The third machine was memory itself, organised as commemoration. The movement kept its anniversaries, republished its martyrs, taught its splits as scripture and history at once, and maintained, through organisations of veterans and through the archives its exiles deposited in Amsterdam and in American universities, a continuous institutional remembrance across the deaths of all its founders. Memory of that intensity is a survival technology for stateless movements, as it is for stateless peoples, and it exacts the price such technologies always exact: the past becomes the senior partner in every present decision, and innovation must disguise itself as restoration. The movement’s repeated pattern, in which every new departure was presented as a return to the founder’s authentic positions and every opponent as the innovator who had betrayed them, is the price made visible. Yet the same memory preserved, for a later scholarship that the founders never imagined, the documentary basis on which the history in this article rests, including the evidence for its least flattering conclusions. A tradition that archives its own refutations has a claim on the respect of historians that many larger movements, tidier with their records, cannot match.

It remains to place the tradition in the longest perspective its record allows. The Fourth International was the last of the classical Internationals to be founded, the smallest of them, and the only one whose founding purpose, the leadership of world revolution, was still being asserted by its claimants at a distance of generations from any plausible occasion for it. Its history compresses, into an unusually well documented miniature, the great themes of the century’s left: the Russian Revolution’s promise and degeneration, the confrontation with fascism and with Stalinism, the colonial revolutions, the postwar settlement and its dissolution, the rise and dispersal of the new left. To study the miniature is to study the themes with the advantages of scale, every mechanism exposed, every document preserved, every actor articulate. That is the sense in which the legacy exceeds the movement, and it is a sense the founders, who despised miniatures and intended monuments, would have received with the mixture of pride and fury that their tradition, at its most honest, learned to direct at its own reflection. The series to which this article belongs takes the same view of every school it examines: that a tradition is to be explained before it is judged, that its failures are data and its survivals are data, and that the explanation, to be worth anything, must survive contact with the strongest case against it. The Fourth International, explained, is neither the punchline of the comedy version nor the betrayed vanguard of the publicists’ version. It is the century’s most instructive small movement, and instruction, in the end, is a legacy.

The tradition in the colonial and semicolonial world

The European and North American sections dominate the movement’s literature because they held its presses, but some of its most substantial chapters were written where its doctrine of permanent revolution was aimed. In Vietnam, Trotskyist militants built during the nineteen thirties one of the movement’s most impressive followings anywhere, winning mass support in Saigon, leading unions and a famous campaign around the Indochina congress demand, and entering the August Revolution of 1945 with real forces, only to be destroyed within months, their leaders assassinated in the struggle for power between the returning French and the Communist-led resistance. The Vietnamese case is the repression factor at its most lethal and the isolation factor at its most complete: a section with a mass audience, exterminated before it could transmit its experience to the rest of the International, so that the tradition’s memory of its own most successful colonial implantation survives largely through the testimony of the few who escaped. It stands in the record as the sharpest refutation of the notion that the movement’s smallness everywhere reflected a failure of its cadres to find audiences. In Indochina the audience was found. The section was murdered.

In Bolivia, the movement’s militants worked inside one of the most combative labour movements in the Americas, the tin miners whose federation adopted at Pulacayo in 1946 a programme of transitional demands that remains a classic of the genre, and the Trotskyist party there played a real role in the revolution of 1952 and in the armed militias and union politics that followed, before the revolution’s consolidation under a nationalist government and the repressions of the military years reduced it. The Bolivian experience supplied the International with one of its few prolonged cases of a section operating at the centre of national events, and its lessons were argued over in the world movement for decades, because the case bore on the central strategic dispute of the epoch: whether a revolutionary party should support, enter or oppose a nationalist government that had expropriated the mines and armed the workers, a question on which the Bolivian section’s own record was mixed enough to arm every tendency. In India and Ceylon the tradition had older roots, and in Ceylon, as the article has shown, it produced its one governmental career. In the Arab world, in South Africa, in Japan, small groups carried the doctrine into conditions the founders had never studied, translating the founding texts and adapting the method with a freedom the centre alternately blessed and condemned. The colonial chapters matter to the legacy for a reason beyond their drama. The theory of permanent revolution, the tradition’s central contribution to Marxist thought, was a theory about exactly those societies, and its fortunes there, vindicated in part by revolutions that grew over as predicted though under other leaderships, refuted in part by the durability of the regimes those revolutions built, constitute the theory’s real examination. The organisational fate of the sections that carried the theory into the colonial world, brilliant implantation in one place, massacre in another, governmental office in a third, is the examination’s mark sheet, and it resists every summary simpler than the three factors in combination.

The tradition’s engagement with national liberation also produced some of its most distinctive theoretical work, because the questions arrived there without European precedents. How should revolutionaries relate to national movements led by bourgeois or military figures? What weight should democratic demands, land, independence, a constituent assembly, carry in a programme for societies where the working class was a minority of the population? When did support for a liberation struggle end and political dissolution begin? The movement’s answers, developed in congress documents and in the writings of its colonial militants, fed into the wider Marxist discussion of the national question and influenced movements that never acknowledged the source. The traffic of influence in the colonial world also ran in the direction of practice: solidarity networks in the metropolitan countries, of the kind that sustained the Algerian struggle, taught a generation of European militants the techniques of clandestine support work, and those techniques, and the people trained in them, passed into the solidarity movements of later decades as a living inheritance.

Authority after the founder: the government of texts

Every founder-centred movement faces the succession problem, and the Fourth International faced it in its most unforgiving form: the founder was murdered by the movement’s principal enemy at the moment of the movement’s maximum danger, leaving no designated successor, no institution with independent legitimacy and a body of writings that stopped in August 1940, before the postwar world existed. Authority thereafter was textual, and textual authority has properties that shaped everything. A text cannot be negotiated with; it can only be interpreted, and interpretation in a movement without a supreme court becomes a competitive industry. The founder’s writings were, fortunately for the tradition and unfortunately for its unity, voluminous, occasional and polemical, composed for specific battles whose contexts receded, so that a determined reader could assemble from them a brief for almost any course the postwar world proposed. Cannon could quote the founder against Pablo, and Pablo against Cannon, and both quotations were genuine. The situation is familiar from the history of scriptural religions, and the comparison, made here analytically and without derision, is the most economical way to understand the movement’s internal culture in its later decades: orthodoxies and heresies, commentaries and concordances, councils and anathemas, a canon defended by schools. What the comparison adds, beyond economy, is a prediction the record confirms: scriptural movements do not die of their disputes, because the disputes are a mode of transmission. The Fourth International’s claimants have now transmitted the founding texts across more generations than the founder’s party survived to see, and the transmission, however embattled, is a fact of cultural history that the membership figures of any given year entirely fail to capture.

The government of texts also explains the movement’s curious combination of conservatism and inventiveness. Innovation was constant, because the postwar world kept posing questions the canon had not answered, and every innovation was dressed as exegesis, because exegesis was the only legitimate dress. The result is a literature in which substantial new theories, Mandel’s long waves, the analysis of the permanent arms economy, theories of bureaucratic collectivism and of state capitalism from the dissenting schools, present themselves as readings, and in which the reader must learn to discount the presentation to find the thought. Historians of the movement who master that discount rate gain access to one of the richest theoretical literatures of the postwar left; readers who take the presentations at face value conclude, wrongly, that nothing was thought in the tradition after 1940. Something similar might be said of the movement’s historiography, which advanced from factional chronicle toward archival scholarship across the same decades, as a generation of writers formed inside the tradition subjected its own record to the standards of the profession and published findings their elders received as treason and their readers received as history. The maturation of a movement’s account of itself is among the surest signs that the movement has become, in part, a culture, and cultures, unlike general staffs, are built to last.

The legacy weighed

Weighing a legacy is a different operation from totalling it, and the distinction should govern the last stage of the argument. The items on the movement’s balance sheet do not share a currency. A failed founding purpose, a library of theory, a murdered Vietnamese section, a finance ministry in Colombo, a trilogy that taught two generations how the Russian Revolution felt from inside, an economic literature still argued with, a technique of entry debated wherever small parties face large ones, an archive that saved a revolution’s evidence from its jailers: no sum exists in which these cancel out, and the historian’s task is not summation but placement, showing which items belong to the organisation, which to the tradition the organisation carried, and which to the individuals the tradition formed. Placed in that way, the record yields a judgement that fits the evidence better than either of the standing verdicts. The organisation failed, on its own terms, comprehensively and instructively. The tradition succeeded, on terms it would not have chosen, partially and really, as a school of Marxism whose graduates and texts entered the general intellectual and political culture of several countries. The individuals divide, as individuals do, between those the movement consumed and those it made, with many names appearing, at different hours of their lives, on both sides of that line.

There is a final consideration, and it concerns the uses of the case for readers who belong to no tradition at all. The Fourth International is the best documented natural experiment available on a question of general interest: what happens to a doctrine when the organisation built to enact it is denied, for the whole of its life, the conditions the doctrine presupposed? The experiment’s results are now substantially in. The doctrine does not die; it scholasticises at the centre and ferments at the edges. The organisation does not simply shrink; it speciates, each fragment adapting the inheritance to a niche. The influence does not vanish; it changes state, from power to culture, from command to formation, from the leadership of events to the equipment of the people who interpret them. And the whole process is governed, with a regularity that invites generalisation, by the interaction of repression endured, constituencies lacked and propositions undecidable, the three factors with which the explanation began. A reader who grasps the experiment has a tool for reading every movement that has ever promised more history than history delivered, which is to say most movements that matter, and that tool, rather than any verdict on the defendants, is the article’s intended bequest. The Fourth International’s sections still meet, publish and dispute, in a landscape their founders would not recognise, carrying documents written for a war that ended before most of their members were born. Whether that persistence is fidelity or afterlife is the question the tradition asks itself, in its internal bulletins, with undiminished seriousness. The honest external answer is that it is both, and that the bothness, examined patiently, teaches more about the century the movement failed to lead than many a success story teaches about itself.

Three national patterns: France, Britain and the United States

The International was one organisation on paper and several different movements in fact, and the national variations test the three-factor account as usefully as the splits do. In the United States the tradition possessed its most durable independent party. The Socialist Workers Party, built by Cannon out of the communist opposition of the nineteen twenties and tempered in the Minneapolis strikes of 1934, survived the Smith Act prosecutions, the split of 1940, the cold war’s long frost and its own later divisions with an apparatus, a publishing house and a headquarters that gave the world movement a material anchor for decades. The American pattern shows the tradition at its most party-like: rooted in episodes of real class struggle, led by organisers rather than litterateurs, and correspondingly stubborn in defence of its independence against the Paris centre, a stubbornness that made it the natural headquarters of the 1953 opposition. Its history also shows the cost of the anchor’s weight: for long periods the International’s internal balance was set by the needs of its American section, and disputes that began as American quarrels were exported as world doctrine.

France supplied the opposite pattern, a movement of exceptional intellectual brilliance and exceptional instability, in the country where the tradition’s ideas had their largest public echo. French Trotskyism produced organisers of the resistance, theorists of the first rank and, in the generation of 1968, mass student organisations whose leaders became national figures. It also produced a proliferation of currents unmatched anywhere, as though the same soil that grew the ideas fastest also divided them fastest. The French pattern is the doctrine factor in its purest national form: where the audience for Marxist theory was largest and the competition among its interpreters most intense, the movement’s energy ran to commentary, programme and polemic, and its organisations speciated accordingly. Britain supplied a third pattern, dominated across the postwar decades by the question of the Labour Party. A small independent organisation of the nineteen thirties gave way, after the war, to deep and prolonged entry work, as the tradition’s largest British current concluded that the road to the British working class ran through the party that class had built, and spent decades inside it, building a tendency of genuine weight in its youth movement and its constituency parties before the expulsions of the nineteen eighties scattered the experiment. The British pattern is entryism’s fullest test: the audience was reached, the influence inside the host was real and documented, and the price, the subordination of the guests’ timetable and eventually of their cohesion to the host’s internal wars, was paid in full. Three countries, three weightings of the same three factors, and in each case the outcome, durable party, brilliant fragmentation, absorbed influence, follows the weighting with a regularity that purely biographical accounts of the movement never achieve.

Beneath the national patterns lay a common material substratum that historians of ideas too often skip: money, premises and time. The movement ran on members’ dues levied at rates that would shame a trade union, on the unpaid labour of full-time organisers supported at subsistence, on print shops bought with bequests and on the professional incomes of sympathisers. Its poverty was not incidental to its politics. A centre that cannot pay its emissaries cannot inspect its sections; a section that cannot pay its organisers selects for the young, the unattached and the independently supported, and thereby for a sociology quite different from the class it addresses; a press that must be fed weekly consumes the energies that a richer organisation would spend on the world. When the movement’s opponents attributed its character to the psychology of its members, they inverted the causation with impressive consistency. The psychology was substantially the deposit of the material situation, and the material situation was the deposit of the defeats and the isolation already described. The three factors, pursued to the bottom, are one factor seen at three depths: a movement dispossessed of the century’s resources, arguing, under police attention and without an audience, about propositions that only an audience could have settled.

Inside a faction fight: the social mechanics of a split

Because the splits are the tradition’s most visible product, their internal mechanics deserve a description drawn from the movement’s own abundant documentation, so that readers can see the three factors at work at the scale of a single organisation. A faction fight in this tradition typically began with a document: a platform or thesis circulated in an internal bulletin, taking a position on the question of the hour, the class character of a new regime, the transitional status of a demand, the conduct of a campaign. Discussion followed in branches, where the document’s supporters and opponents recruited, and the discussion period, governed by statutes that protected organised tendencies, allowed both sides to consolidate: lists of supporters were drawn up, loyalties in the apparatus were sounded, the youth were courted. A conference then voted, and the statutes provided the ending: the minority submits, or the minority leaves, or the leadership expels the minority for breaches of the discipline the fight itself had strained. What the statutes could not provide was a reason for the losers to stay that outweighed the reason the fight had been started. If the disputed proposition concerned the class character of a state ruling half of Europe, submission meant years of public advocacy of a position the minority believed false on the largest question in politics. Departure meant a new letterhead, a duplicated paper, a halved hall rental and the preservation of the position. Given the movement’s valuation of doctrine over apparatus, departure won with metronomic regularity, and each departure lowered the cost of the next by demonstrating that survival outside was possible and even, in the first exhilaration of independence, pleasant.

The human texture of these events, preserved in memoirs written from every side, is more various than the mechanics suggest. Faction fights consumed friendships of twenty years and marriages contracted in the movement; they also produced the tradition’s characteristic intellectual goods, because a platform written to defeat comrades is written with a care that appeals to the converted rarely demand. The great internal documents of the tradition, read in the collected bulletins, are frequently superb: documented, argued, alive to the strongest opposing case, because the opposing case was going to be answered by name within the month. Polemic of that quality is a forced crop, grown in the hothouse of small numbers and total disagreement, and the hothouse is the same one that grew the splits. A reader who wonders how so small a movement produced so large a literature, of theory, of history and of self-examination, has the answer in the mechanics: writing was what its members did instead of governing, and fighting in writing was what they did instead of compromising, and they became extremely good at both. The tradition’s journals and publishing houses were the institutional sediment of that fact, and their survival beyond any particular faction is why the influence panel of the table is populated at all.

Expulsion, the alternative ending, left its own deposit on the movement’s character. An organisation that expels readily teaches its members that belonging is conditional on agreement, and the lesson, repeated across generations, produced cadres who monitored their own orthodoxy as carefully as their opponents’ deviations, and who experienced intellectual development, the changing of a considered position, as a dangerous act requiring either disguise as exegesis or preparation as a faction. The cost in originality is incalculable precisely because its items are the books not written and the questions not asked, but the movement’s own reflective literature acknowledges it, in essays by its leading figures on the regime of internal life and on the difference between a party and a sect, essays that diagnose the pathology accurately and were powerless, being texts, to cure a condition produced by structure. That powerlessness is the final lesson of the mechanics. The movement understood itself unusually well. Understanding was not among the factors that determined its fate, and the gap between its self-knowledge and its self-command is the most human thing in its record and the most instructive for students of organisation everywhere.

The Fourth International among the Internationals

Comparison with its predecessors sharpens the picture, because the Fourth International defined itself against their fates and reproduced more of them than it admitted. The First International, Marx’s International Workingmen’s Association, was a loose federation of unions and political currents destroyed in the end by the quarrel between its Marxist centre and the anarchist opposition, a quarrel conducted, like so many of its successor’s, over doctrine and organisational authority in a body too weak to contain both. The Second International was the opposite construction, a federation of mass parties whose unity dissolved in August 1914 when its sections voted war credits to their own governments, demonstrating that size is no guarantee of cohesion when the disputed question is large enough and the national pulls strong enough. The Third International, the Comintern, achieved the centralised discipline the Fourth’s founders had served and then fled, and demonstrated in their analysis the terminus of that road: a world movement administered as an instrument of one state, its sections purged and its strategy subordinated, until its dissolution by decree in 1943 as a diplomatic gesture. The Fourth inherited the First’s weakness, the Second’s exposure to questions larger than its cohesion and the Third’s doctrinal centralism, in combination and at miniature scale. The inheritance was not chosen item by item; it was the common estate of the form itself, the international party, and the founders’ belief that their programme exempted them from the form’s history is the most humanly understandable of their errors.

The comparison also yields the movement’s one unambiguous distinction. Each predecessor International died, and died at the hands of events its doctrine had not mastered: the First of its internal quarrel after the Paris Commune, the Second of the war, the Third of its own master. The Fourth, denied every condition of success, did not die. It fragmented, diminished and speciated, but the name, the programme and the claim were transmitted without interruption across the whole remaining century, and the transmission was accomplished by the least powerful machinery of the four: no state, no mass parties, no treasury, nothing but texts, schools and the obstinacy of the convinced. Longevity is a modest virtue beside the aims the founders entertained, and the article has been careful not to spend it as a substitute for them. But in a century that dissolved organisations with a hundred times its resources, survival on those terms is a datum that the failure verdict, unmodified, cannot digest, and it belongs in the balance beside the splits: the same constitution that made the movement unable to stop dividing also made it unable to stop.

The uncounted infrastructure: translators, organisers and couriers

Histories of doctrine are written from the texts of leaders, and the Fourth International’s own histories follow the habit, but the organisation that the texts describe existed because of labour that rarely signed anything. Translators carried the movement’s arguments across its linguistic frontiers, rendering the founder’s Russian and German into French, English and Spanish and the sections’ polemics back again, and the quality of that invisible work set the real boundaries of the international conversation: a position existed for the world movement when it had been translated, and not before. Organisers of the second rank, the full-timers who kept branch rooms open, sold the papers, chaired the tedious meetings and knew the members’ circumstances, supplied the continuity that congresses merely ratified, and their departure in a faction fight, more than the departure of any theorist, was what a split actually cost on the ground. Couriers and archivists, many of them women whose names survive in the movement’s records mainly as the wives, companions and secretaries of documented men, maintained the correspondence networks and the deposits of papers on which the whole structure depended; the archive that later scholarship used was assembled substantially by Natalia Sedova and by the secretaries and librarians of the exile centres, working under police attention with the movement’s history in suitcases. An account of the legacy that counts only the named theorists understates the tradition’s real sociology and repeats its own hierarchy of value. The influence described in this article travelled through classrooms and union halls because uncounted people maintained the channels, and the fragmentation, too, was lived at their level, as the dividing of duplicators and mailing lists and the choosing of which old friend’s meetings to stop attending.

The infrastructure also explains a feature of the movement’s morale that outsiders found baffling: its capacity to absorb defeats that would have dissolved a less labour-intensive association. An organisation held together by belief alone is brittle under disappointment, since belief is what disappointment attacks. An organisation held together additionally by shared work, by the paper that must appear on Friday and the hall that must be paid for and the comrade in prison whose family must be visited, possesses routines that carry its members through periods when belief is at low ebb, and the Fourth International’s sections were rich in such routines to a degree that amounted to a second, unspoken constitution. The splits were the points where the routines failed, where the shared work itself became the disputed territory, and the memoirs’ grief at those moments, disproportionate to the organisations’ size, measures how much of the members’ lives the routines had organised. To lose a faction fight in this tradition was to lose, at a stroke, one’s newspaper, one’s social world, one’s account of the past twenty years and one’s expectation of the future, and the knowledge of what departure cost is the necessary background to the movement’s ferocities and to its fidelities alike.

The tradition in the age of its afterlife

The last phase of the story poses the question of what a movement becomes when the world that produced its questions has itself passed away. The Soviet Union, whose class character was the tradition’s central doctrinal test, ceased to exist in 1991, and the states built in its image either collapsed or transformed themselves beyond the founders’ categories. The mass Communist parties of the West dissolved or dwindled. The social democratic parties the entrists had entered mutated into organisations their founders would not have recognised. Judged by the movement’s own method, the disappearance of its great objects should have dissolved the tradition or transformed it utterly, and in part the prediction held: the doctrinal test lost its object, and with it went the sharpest edge of the old disputes. But the tradition persisted into the new landscape in its denominational form, its claimants still teaching the founding texts, its publishing houses still in print, its veterans and its young recruits still arriving by the same narrow road of conviction. Persistence after the disappearance of the disputed object is the final evidence for the article’s structural reading. The movement’s cohesion was never supplied by the Soviet question; the question supplied its divisions. Its cohesion was supplied by the school, the press, the routines and the claim, and those survived the question comfortably.

What the afterlife most altered was the tradition’s relation to its own past. A movement that expects vindication within the decade treats its history as a weapon; a movement settling into its second half-century treats its history, increasingly, as an estate to be administered, edited and bequeathed. The great editorial projects of the tradition’s later decades, the collected writings of the founder in many languages, the published archives of the opposition, the scholarly biographies written from inside and outside the ranks, belong to that administration, and they changed the terms on which outsiders could engage the subject at all. The hostile caricature depended on scarcity of evidence; the publicists’ hagiography depended on monopoly of it. The archive ended both dependencies. A student approaching the movement now works from published documents, critical editions and a mature secondary literature, and the effect has been to make the middle position, the one this article occupies, steadily easier to hold: neither the punchline nor the betrayed vanguard, but a small, documented, consequential failure, whose consequences include a disproportionate share of the century’s Marxist thought. That the movement’s own labours made the middle position possible is the last and perhaps the most durable item in the lower panel of the table.

The root inside Russia: the Left Opposition’s last years

The International’s character was set before its founding by the fate of the movement inside the Soviet Union, and that prehistory deserves fuller treatment than the founding narrative usually allows it. The Left Opposition of 1923 began as a platform within the ruling party, arguing over economic policy, inner-party democracy and the course of the world movement, and its first adherents included figures at the summit of the revolution: commissars, diplomats, commanders of the Red Army, the editors of its press. Defeat inside the party proceeded by administrative stages, expulsion of the leaders in 1927, exile of Trotsky first to Alma-Ata and then abroad, and thereafter the opposition’s existence inside the country was a descent through illegality into annihilation. Oppositionists organised in the factories and the army were arrested in waves; those who recanted were readmitted to a narrowing circle of survival; those who held out were sent to the isolators and the camps of the far north and Siberia, where they maintained, in conditions of extremity that the testimony of survivors records in detail, the practices of the movement in miniature: platforms drafted, votes taken, hunger strikes organised against the regime of the camps, correspondence smuggled between barracks. In the Terror of the later nineteen thirties the imprisoned opposition was destroyed almost in its entirety, executed in batches or perishing in the camps, and the tradition abroad received the news in fragments, through escapees and through the silence of correspondents who answered no more letters.

That root’s destruction matters to the explanation of everything that followed in two ways. It removed, first, the Russian school of the movement, the generation that had made a revolution and administered a state, whose authority within the International might have balanced the founder’s and whose practical experience might have corrected the exiles’ textualism. The world movement that met in 1938 was a movement of the periphery about a centre that no longer existed, and its politics bore the mark: doctrines formed in the Russian debates were preserved with a fidelity that owed something to the impossibility of consulting their authors. It mattered, second, as the founding trauma that the repression factor names. Every leader of the International had watched the strongest section of the world movement be annihilated by a police apparatus that then pursued the survivors across Europe, and the knowledge was not metaphorical. When later generations of the tradition displayed a suspicion of internal opponents that struck outsiders as paranoid, they were exhibiting an inheritance whose original warrant was documentary and mortal. Inheritances of that kind do not expire on schedule, and the student of the movement’s internal culture who ignores the camps will find the culture unintelligible.

The Spanish Civil War served the founding generation as its second school, and the lessons it drew there hardened into the International’s reflexes. In Spain the movement’s adherents were few, divided between a small section and the larger dissident communism of the POUM, with whose leader, Andreu Nin, Trotsky had broken over strategy before the war began. The revolution that unfolded in Catalonia in 1936 posed, in the founders’ reading, the classical sequence their doctrine described: a working class in arms, a bourgeois republic incapable of waging war and making revolution at once, and a Communist apparatus, armed with Soviet aid and Soviet police methods, suppressing the revolution in the name of the war. Nin was murdered by Soviet agents in 1937; the POUM was driven underground; the Barcelona fighting of May 1937, in which the republican government and its Communist allies moved against the revolutionary organisations of their own camp, entered the tradition’s memory as the epoch in epitome. The strategic conclusions the founders drew, that no alliance with the Communist apparatus could be trusted, that popular front governments were traps, that the independence of the revolutionary organisation was the supreme tactical value, were written into the founding documents and governed the International’s choices for decades. Spain is therefore the hinge between the prehistory and the programme: the Transitional Programme’s suspicion of every halfway house, its insistence on demands that cannot be absorbed, its refusal of ministerialism, are the Spanish lessons codified, and the Ceylonese expulsion of 1964, for the crime of entering a coalition, was the codification still enforcing itself a generation later against the tradition’s own most successful party.

The American crucible: Minneapolis, the trials and the long frost

The tradition’s American chapter illustrates, at the scale of one country, how much of the movement’s fate was decided by encounters with its enemies rather than by its internal arguments. The American Trotskyists entered the nineteen thirties as a small expelled current of the Communist Party and made their reputation in the labour movement’s hardest school, the Minneapolis strikes of 1934, where their cadres led the teamsters’ battles that broke the open shop in that city and entered the national memory of American labour. The Minneapolis victory gave the movement something it possessed almost nowhere else: leaders whose authority rested on strikes won, a base among industrial workers and a tradition of practical competence that disciplined its politics for a generation. The Smith Act prosecution of 1941, in which the party’s national leadership was tried for the advocacy of its doctrines in a case the government prepared in part at the instigation of rival union leaderships, then supplied the movement with its American martyrology and with a landmark in the law of free speech, since the convictions were obtained for ideas rather than acts and were deplored, in time, by much of the legal establishment that had countenanced them. The leaders served their sentences and returned to a movement entering the long frost of the cold war, in which the price of the doctrine was exclusion from the unions the party had helped to build, as the postwar labour leaderships purged their left critics of every shade.

The American experience also seeded the world movement with two of its most durable assets and two of its most persistent problems. The assets were a publishing operation of professional standard, which kept the founder’s writings and the classics in print in English through the decades when English became the century’s scholarly lingua franca, and a habit of engaging the country’s real politics, its unions, its racial struggles and its wars, that periodically refreshed the doctrine with American material. The problems were the obverse: a tendency to treat the American section’s experience as the template of normal development, and a corresponding impatience, felt from Paris to Colombo, with a centre that was not consulted and a section that could not be instructed. The 1953 division ran along exactly that seam, and the seam’s existence was structural before it was personal: an International whose resources sat in one country and whose authority sat in another had built a permanent constitutional crisis into its geography, and no programme could repeal the map.

The shared canon: what the claimants agree on

An outsider surveying the rival organisations may miss the extent of their agreement, because their literature advertises the differences, and the agreement is worth stating as the necessary counterweight. Every claimant teaches the same founding narrative: the degeneration of the Russian Revolution under the bureaucracy, the failure of the Communist International announced by the German catastrophe, the necessity of the foundation of 1938 and the Transitional Programme as the bridge between the workers’ present consciousness and the conquest of power. Every claimant teaches the theory of permanent revolution and the analysis of fascism associated with the founder’s writings of the nineteen thirties. Every claimant honours the same martyrology, from the imprisoned oppositionists of the camps to the murdered secretaries of the exile years, and keeps the same anniversaries. And every claimant recruits by the same road, offering the convinced young reader a total interpretation of the century and a community organised around it, which is why the claimants compete for the same people and why their competition, however bitter, takes place inside a single culture. The denominational comparison completes itself here: denominations are recognised not by their quarrels but by their shared scripture and shared saints, and the Trotskyist tradition, surveyed whole, has both.

The shared canon had one institutional consequence that shaped the influence story, because it made the tradition’s texts common property beneath the factions’ competing commentaries. A student radicalised in any claimant’s school could read across the tradition’s whole literature, Mandel from one house, Deutscher from none, the founder from all, and generations of readers did exactly that, assembling their formation from the common stock while the custodians disputed the commentary. The influence therefore cannot be assigned to any single claimant without falsifying it, and the article’s practice of crediting the tradition rather than its bodies is not a courtesy but a description of how the transmission worked. Publishers understood the point commercially long before historians stated it: the classical texts sold to a readership the factions shared, and the publishing houses serving that readership, whether aligned with one claimant, with none or with the universities, formed a single ecosystem in which the tradition’s intellectual capital circulated regardless of the state of relations among its organisational trustees.

That ecosystem also set the terms of the tradition’s engagement with its critics, academic and political, across the decades. A critic engaging the Trotskyist analysis of the Soviet Union, of fascism or of the postwar boom engaged a literature, not a headquarters, and the literature’s quality determined the engagement’s quality. Where the literature was strong, in economics and in the historiography of the Russian Revolution above all, the engagement was serious and the tradition’s positions entered the general debate, to be absorbed, amended or refuted on their merits. Where the literature thinned into commentary on the founder’s occasional writings, the engagement thinned with it. The tradition’s intellectual map is thus uneven in a way its organisational map never shows: formidable in the fields where its isolation drove it to depth, derivative where it subsisted on exegesis, and silent where its categories met phenomena, from the transformation of work to the politics of the postcolonial states in their maturity, that its founding generation had not lived to analyse. A balanced legacy must include the silences, since they mark the boundary between a living research programme and a preserved one, and different regions of the tradition’s map fall on different sides of that line at different dates. Mandel’s economics, which engaged the newest phenomena of the postwar economy with the oldest categories of the doctrine, stands on one side of it; the endless re-litigation of the verdicts of 1940 stands, for most readers, on the other, and the distance between the two is the distance the tradition travelled, in both directions, from the intentions of its founders.

The verdict of the evidence

The evidence assembled across this article can now be allowed to settle into the judgement it supports, stated without the protection of either camp’s vocabulary. The Fourth International was founded to do a specific thing, to lead the working class of the world to power in the crisis its founders believed terminal, and at that thing it failed so completely that the failure requires no emphasis. The failure was not primarily a failure of courage, of intelligence or of effort, all of which the record displays in unusual concentration. It was a failure of fit between a constitution and a century: an organisation designed for imminent mass responsibility, governed by propositions that only mass practice could arbitrate, operating in conditions of persecution and marginality that made the arbitration impossible. The three-factor fragmentation is the name this article has given the misfit, and its claim is the modest, testable one that the same misfit, assembled anywhere, yields the same history.

Against that failure the record sets achievements of a different order, which the failure does not cancel because they were never the organisation’s to cancel: a body of economic and historical writing that entered the permanent literature of its subjects; a generation of militants formed to a standard that larger movements borrowed from; a literature of the Russian Revolution preserved against the organised forgetting of two hostile propagandas; a party that governed, once, in one island, and learned in office the lesson the whole tradition had theorised in exile; and a demonstration, conducted at ruinous personal cost across three generations, of how doctrines behave when history refuses them. The founders would have despised the consolation, and their contempt is itself part of the record, since it was the refusal of consolation that kept the machine running at full doctrinal pressure long after a more accommodating movement would have pensioned its programme and kept its hall. Traditions are not obliged to accept the historian’s scales. They are obliged, if they wish to be read by anyone outside their own ranks, to survive the historian’s evidence, and this one, uniquely among the small movements of its century, generated and preserved the evidence by which it might be judged. That is the legacy in its final form: not the world the founders intended, and not the nothing their enemies advertised, but an archive, a school and a warning, bound in one set of covers and still being argued over by the heirs.

A note on sources and the shape of the record

Readers who pursue the subject beyond this article should understand the terrain of its sources, because the terrain explains many of the literature’s disputes. The primary record divides into the founder’s published writings, available in collected editions in several languages; the documents of the organisations, congress resolutions, internal bulletins and factional platforms, preserved unevenly and published selectively; the memoirs of participants, abundant and mutually corrective; and the state archives, Soviet and Western, whose partial opening transformed the study of the movement’s repression and of its Russian root. Each class of source has its characteristic distortion. The founder’s writings are occasional and polemical, composed against named opponents in vanished conjunctures. The organisational documents were written to win internal arguments and must be read as advocacy. The memoirs settle scores their authors carried for decades. The police archives record what the hunters believed, which includes their fantasies alongside their facts. The mature scholarship of the movement, biographies and studies produced to professional standards from the nineteen sixties onward, works by triangulating the four classes against one another, and a reader equipped with that method can extract a reliable narrative from materials none of which is reliable alone.

The shape of the record also explains why the movement’s history keeps being rewritten, and why the rewritings cluster around the same episodes. The founding, the 1940 division, the crisis of 1953 and the Ceylonese expulsion are the four points at which the largest questions intersect the densest documentation, and each generation of historians returns to them with the newly opened archives and the newly published correspondence, revising verdicts that the participants believed settled. That revisability is healthy, and it is the final reason the article has declined to adjudicate the succession among the claimants: a field whose documentary base is still expanding punishes premature closure, and the open questions, the exact balance of the centre’s conduct in 1953, the inner history of the Vietnamese section’s last months, the full roster of the repression’s agents inside the exile movement, are stated here as open because the evidence, in the judgement of the scholars who know it best, remains incomplete. What is not open is the structure of the explanation. New documents may redistribute praise and blame among the actors; they are unlikely to dissolve the conjunction of persecution, isolation and undecidable doctrine that the record, in every archive so far opened, displays as the engine of the story. Explanations that survive the opening of archives hostile to them have earned their keep, and the three-factor account is offered in that confidence and with that invitation to test it.

The questions readers bring, answered in the body

A survey of the subject would be incomplete without gathering the questions that bring most readers to it, several of which the article has answered in passing and which deserve a consolidated word. Readers ask whether Trotskyism is a cult, and the honest answer distinguishes the form from the feeling: the tradition possesses a founder’s canon, a martyrology and a claim to succession, all of which it shares with churches, and it also possesses a documented internal life of argument, opposition and published dissent that no cult tolerates, since the factional bulletin, that characteristic institution, is a machine for printing the heresies a cult exists to suppress. Readers ask whether the movement achieved anything, and the answer is the lower panel of the table: books that altered their fields, a literature preserved, militants supplied to a century of struggles, one ministry and one expulsion that taught the tradition the price of its own red lines. Readers ask whether the tradition persists, and the answer is that its organisations persist in their denominational form, its texts persist in print and in syllabuses, and its questions persist wherever Marxists argue about bureaucracy, about the relation of democratic to socialist demands and about the strategy of movements that begin small. A tradition survives in its questions when its organisations can no longer enforce its answers, and by that measure the Fourth International, which began by expecting to command the century, ends by interrogating it, a smaller fate than the founders intended and a larger one than their enemies predicted, which is the shape of the whole story told once more at the scale of a single reader’s curiosity.

The founders’ wager, restated

Every argument in this article returns, at the last, to the wager the founders placed in September 1938, and the wager is worth restating in their own terms before the record is closed. They wagered that the civilisation of private property had exhausted its capacity to develop the productive forces and to govern without catastrophe; that the working class, driven by that exhaustion, would be compelled toward revolution in country after country; that the outcome of each such crisis would turn on the presence or absence of a leadership armed with the programme the founders had assembled; and that a small organisation holding that programme intact through the interval of waiting would be transformed, by the crises themselves, into the leadership required. Each clause of the wager can be examined separately, and the examination is the fairest summary of the legacy. The first clause, the exhaustion of the old order, was refuted for a generation by the postwar boom and has been debated in every decade since in the language of long waves and profitability that Mandel’s school supplied. The second clause mistook the direction of the postwar decades, in which the working classes of the advanced countries were integrated into rising consumption and the revolutionary crises occurred at the periphery under other banners. The third clause, the primacy of leadership, was never tested in the founders’ sense, because the fourth clause’s transformation never occurred: the organisation that waited was not enlarged by the crises that did arrive but was repeatedly conscripted, divided and set back by them, in the pattern the article has traced. A wager lost on every clause is a complete defeat, and the article has not pretended otherwise. What the completeness of the defeat throws into relief is the quality of the losers’ response to it: they documented the loss, argued it, preserved the stake and taught the game to three more generations, and the documentation, the argument and the teaching are what the world actually received from the Fourth International. History is full of movements that lost wagers and left nothing. This one left the record of the wager and the instruments to judge it, and a tradition that supplies the means of its own refutation has earned the serious treatment this article has tried, throughout, to give it.

Why the case still matters beyond the tradition

The case matters, finally, to readers with no stake in the tradition’s verdicts, because the forces that shaped it are general and still operating. Every political generation produces small movements armed with total explanations and large expectations, and the questions their organisers face are the questions this article has anatomised: how to hold disagreement inside an organisation whose members joined for the doctrine; how to tell the difference between a strategy and a scripture; how to count influence honestly when the membership figures disappoint; how to preserve a record without being imprisoned by it. The Fourth International faced those questions under persecution and across a century, documented its answers with uncommon completeness and paid for its errors in a currency that makes them impossible to sentimentalise. A reader who has worked through its history possesses a set of calibrated expectations for every comparable enterprise: that undecidable questions will be decided by schism unless practice arbitrates them, that isolation will intellectualise a movement whether it wishes it or not, that influence will flow through people and texts along channels the organisation chart does not show, and that survival, where it occurs, will belong to the movements that built schools, presses and routines rather than to those that built only platforms. Those expectations, earned in the hardest school the century offered its revolutionaries, are the article’s last word on the legacy and the series’ reason for giving a small movement a long article.

One further distinction protects readers against the commonest error in the secondary literature, the confusion of the tradition with its loudest fragment at any given date. Journalists and historians under deadline understandably treat the claimant most visible in their country and decade as the movement itself, and the resulting accounts date quickly and generalise badly, since the fragments differ precisely in the respects, entry, the Soviet question’s residue, the national road, on which a generalisation would need them to agree. The remedy is the one applied throughout this article: describe the tradition at the level of its shared canon and its shared predicament, descend to the level of particular bodies only where the evidence is specific, and let the plurality stand in the account as it stands in the world, neither tidied into a unity it never possessed nor fragmented into a chaos it never exhibited. Applied consistently, that rule produces the picture the evidence supports, of one school with several custodies and a single, unusually legible history.

For students and exam candidates

Students meet this subject in examinations as a comparison problem, and the comparison that earns marks is the disciplined one: founding aims in one column, later record in the other, and an explanation that uses structure rather than temperament. Learn the three factors as a portable analytical tool, since repression, isolation and undecidable doctrine explain fragmentation in movements far beyond this case and examiners reward the transfer. Secure the fixed points before the analysis: the founding conference of September 1938 near Paris, the Transitional Programme as founding document, the division of 1940 over the Soviet Union’s class character, the world split of 1953 over strategy and the centre’s authority, the partial reunification of 1963, and the Ceylonese exception of a section that became a national party and was expelled after entering a coalition government in 1964. For the doctrinal substance behind the organisational story, work through trotskyism vs stalinism next, because examination questions on the International almost always conceal a question about the quarrel that created it.

For teachers and seminar leaders

This article is built to be taught against its own grain, and a seminar leader can exploit the design. Set the fragmentation and influence table as the opening exhibit and ask the group to argue, from the upper panel alone, that the movement was a failure, then from the lower panel alone that it was a success, before revealing that both panels describe one constitution. The three-factor fragmentation converts well into a case study in organisational sociology, since each factor can be isolated in the evidence and the class can be asked which single factor, removed, would most have changed the outcome. Pair the discussion with democratic centralism explained when the seminar turns to the mechanism by which small organisations convert disagreement into schism, and use the strongest objection section as a model of how to state an opposing case at full strength before answering it, a discipline worth teaching in its own right.

For researchers, historians, and journalists

Researchers will find this tradition unusually rewarding and unusually treacherous, because the documentation is vast and almost all of it was written by participants. The internal bulletins, factional platforms and congress records preserved in archives at Amsterdam and in American university libraries permit a reconstruction of internal life at a granularity no comparable movement allows, but every document arrives with a factional address, and provenance checking is the price of admission. The influence trail set out in the article offers several verifiable research programmes: the reception of Mandel’s economics in the scholarly literature, the Deutscher trilogy’s role in Anglophone historiography, and the transmission of personnel into the journals of the postwar left, for which new left marxism explained and marxist economics complete guide supply the surrounding maps. Journalists covering the far left will find the denominational model of rival claimants more predictive than the vocabulary of splits and mergers borrowed from party politics, and a source map kept in VaultBook, separating claimant literature from archival record, is close to a professional necessity on this beat.

Frequently Asked Questions

Q: What was the Fourth International?

The Fourth International was the international organisation of revolutionary socialist parties founded in September 1938 by supporters of Leon Trotsky, who held that the Communist International had ceased to be capable of reform and required replacement. Its sections pledged themselves to the founding programme, the Transitional Programme, and to the goal of socialist revolution led by an independent working class movement. It never approached the size its founders expected, but it survived its founder, divided repeatedly and persisted as a family of organisations teaching substantially the same doctrine across several continents and generations.

Q: Why was the Fourth International founded?

The foundation answered three pressures at once. The Moscow Trials and the assassinations of the movement’s cadres persuaded its leaders that without a constituted International the surviving opposition would scatter and its doctrine be lost. The destruction of the German workers’ movement in 1933 and the Spanish experience persuaded them that the existing Internationals were incapable of learning from defeat. And the approach of war persuaded them that revolutionary crises were coming for which a leadership had to exist in advance. Foundation was therefore defensive and ambitious in the same act: a lifeboat built as a flagship, launched by people who expected to be vindicated quickly and were determined to survive if they were not.

Q: What is the Transitional Programme?

The Transitional Programme is the founding document of the Fourth International, drafted by Trotsky and adopted at the conference of 1938 under the title The Death Agony of Capitalism and the Tasks of the Fourth International. It argues that the crisis of the epoch is a crisis of revolutionary leadership and constructs a bridge between everyday struggles and the conquest of power out of demands such as a sliding scale of wages and hours, factory committees, the opening of the books and workers’ control of production. Each demand is chosen so that fighting for it leads, in the document’s logic, toward conclusions the existing order cannot accommodate.

Q: Why did the Fourth International split so often?

The repetition had causes deeper than quarrelsomeness. The movement worked under persecution that killed its experienced cadres and exiled the rest, so its organisations lacked the ballast of shared responsibility for real constituencies. Its strategic method required judgements about circumstances that comrades could honestly assess in opposite ways, with the founding text as the only court of appeal. And its central doctrinal question, the class character of the Soviet Union and of states built in its image, divided members over the largest events of the age in terms no enquiry could settle. Where a mass party absorbs such pressures through practical work, the sections met them in conference, and conference defeats repeatedly ended in separate organisations.

Q: Has any Trotskyist party ever held power?

One party of the tradition became a principal national force and held ministerial office. The Lanka Sama Samaja Party in Ceylon led mass strikes, became the main party of the island’s left and in 1964 joined a coalition government, with its leader N. M. Perera serving as Minister of Finance. The International expelled the party for crossing its line against participation in a government administering capitalism, and no other section repeated the experience. The episode is the tradition’s single case of office, and it ended the relationship that produced it, which is why answers to the question must carry both halves of the story.

Q: What is entrism?

Entrism, often spelled entryism, is the tactic by which a revolutionary organisation sends its members into a larger working class party to win its radicalising members to the revolutionary programme. Trotsky launched the classical version in France in 1934, judging that his isolated supporters should enter the socialist party where a generation was in motion. Entries were meant to be open, organised and temporary, with expulsion accepted as a foreseeable cost. Later practice stretched each condition, immersions lasting decades in some countries, and the argument over whether the tactic won audiences or dissolved the entrants became one of the tradition’s permanent disputes.

Q: Who was Ernest Mandel?

Ernest Mandel was a Belgian Marxist economist, a militant of the movement from his youth and a survivor of deportation for resistance activity during the occupation, who became the Fourth International’s leading theorist and the most widely read Marxist economist of the postwar decades. His treatise on Marxist economic theory attempted a systematic restatement of Marx’s doctrine, and his study of late capitalism offered an account of the postwar boom and its limits that entered scholarly debate far beyond his own tradition. He wrote and lectured at a scale that made him a public intellectual in several countries while remaining a functionary of a small and divided movement.

Q: What influence has the movement actually had?

Measured by transmission rather than by assertion, the influence is documented in several fields. Mandel’s economics entered the scholarly mainstream of Marxist debate. Deutscher’s biographical trilogy fixed the terms on which the English-speaking world judged Trotsky and the Russian Revolution. The tradition’s journals, publishing houses and education systems kept a non-Communist Marxism in circulation through the Cold War decades and formed people who carried it into the new left, the universities and the unions. Its parties shaped the internal life of larger organisations through entry work, and one of its sections governed, briefly, in coalition. The influence is real, specific and mostly indirect, which is precisely what makes it interesting.

Q: Are there several Fourth Internationals today?

Yes, in the sense that several distinct international organisations each claim continuity with the body founded in 1938, teach its programme and regard their own line of descent as the legitimate succession. The plurality is the long-term result of the divisions described in this article: each major split produced a body that experienced its separation as the preservation of the founding project rather than a departure from it. An outside observer should treat the competing claims as data about how the tradition understands itself, since the criteria of legitimacy are internal to the inheritance dispute and cannot be settled from outside it.

Q: Why did the movement stay small?

The movement’s doctrine required conditions the postwar world withheld. It predicted breakdown and imminent revolutionary crisis; the advanced countries delivered reconstruction, full employment and rising wages for a generation, which narrowed the audience for a programme of supersession to the far-sighted, the desperate and the young. It competed against Communist parties armed with a state’s prestige and social democratic parties administering real welfare gains. Its continental sections were physically destroyed in the war it had been founded to meet, and its founder was murdered before it was two years old. Smallness was the arithmetic of that market and that timing, reinforced by internal demands that selected for the convinced.

Q: How does the three-factor account explain the Fourth International’s fragmentation?

The account holds that the splits were produced by three pressures acting together. Repression destroyed cadres, exiled leaders and removed the experienced people who might have settled disputes by authority. Defeat and isolation deprived the sections of mass constituencies whose practical work absorbs disagreement, leaving doctrine as the whole content of organisational life. Doctrine then supplied disputes of a peculiarly unresolvable kind, over the class character of states and the correct application of the transitional method, which no vote could settle because the defeated side held the majority’s position to be false on questions of principle. Each factor alone was survivable. In combination they made separation the normal terminus of serious disagreement.

Q: What should a student separate between the founding aims and the later record?

A student should keep the aims and the record in separate accounts and resist grading either by the other. The founding aims were maximal: a world party leading socialist revolution within a short historical interval, superseding the older Internationals. The record is a set of small organisations, a substantial body of theory and historiography, influence transmitted through people and texts, and one national section that reached governmental office and was expelled for it. The aims explain why the institutions took the form they did, including their pathologies. The record shows what those institutions in fact produced. Most weak examination answers collapse the two accounts into a verdict; strong ones hold them apart and analyse the gap.

Q: Why did several organisations claim the same inheritance?

Because the inheritance at stake is a claim about history rather than a stock of property. Each body in the tradition holds that fidelity to the founding programme confers the succession from 1938, so a departing group does not experience itself as founding something new but as preserving something the others have forfeited. Schism therefore multiplies claimants instead of dividing an asset: every split exports the claim intact. The result resembles the denominational structure of a church with a contested scripture, in which rival custodies of the same texts regard one another as deviations, and reunification becomes difficult precisely because it would require one claimant to concede that its separate custody was unnecessary.

Q: How did the tradition influence movements far from its own sections?

The tradition influenced larger movements mainly by supplying people, texts and techniques rather than by directing events. Its education system formed organisers, writers and researchers who carried its methods into trade unions, student movements, journals and universities, often long after any formal membership had lapsed. Its publishing houses kept a Marxist literature in print that shaped the reading of the postwar new left. Its tactical repertoire, above all the transitional method and the practice of organised entry into larger parties, entered the strategic vocabulary of movements that never used its name. Influence of that kind is traced through documented transmissions, books, careers and journals, and it is larger than the movement’s enrolled strength would predict.

Q: What did the entryism tactic try to solve?

Entryism tried to solve the problem of isolation. A revolutionary organisation too small to address the working class directly faced the choice between preserving its independence at the margin or borrowing the audience of a mass party from inside. Entry was the borrowed audience: members joined the larger party openly as revolutionaries, argued for their programme among its radicalising ranks and accepted expulsion as the likely end of the experiment. The tactic’s difficulties were the difficulties of the bargain itself, since a sojourn intended for months could extend for years, during which the host party’s priorities, habits and loyalties worked on the entrants as powerfully as the entrants worked on the host.