The Workers' Party of Marxist Unification (, POUM; ) was a Spanish communist party formed during the Second Republic and mainly active around the Spanish Civil War. It was formed by the fusion of the Trotskyist Communist Left of Spain () and the Workers and Peasants' Bloc (BOC, affiliated with the Right Opposition) against the will of Leon Trotsky, with whom the former broke.
Formation
In 1935, POUM was formed as a communist opposition to the Stalinist form of Communism promoted by the Soviet Union, by the revolutionaries Andreu Nin and Joaquín Maurín. Nin was heavily influenced by the thinking of Leon Trotsky, particularly his permanent revolution thesis. It resulted from the merging of the Communist Party's Left Opposition (the Trotskyist Communist Left of Spain) and the Right Opposition (the Workers and Peasants' Bloc). This alliance was against the wishes of Trotsky, with whom the Communist Left of Spain broke.
Position
The party grew larger than the official Communist Party of Spain (PCE) both nationally and in the communist hotbeds of Catalonia and the Valencian Country, where the Unified Socialist Party of Catalonia (PSUC) represented the PCE. The POUM was highly critical of the popular front strategy advocated by Joseph Stalin and the Comintern; nevertheless, it participated in the Spanish Popular Front initiated by Manuel Azaña, leader of Acción Republicana. The POUM attempted to implement some of its radical policies as part of the Popular Front government, but they were resisted by the more centrist factions.
George Orwell, who fought alongside the POUM in the civil war, reports that its membership was roughly 10,000 in July 1936, 70,000 in December 1936, and 40,000 in June 1937, although he notes that the numbers are from POUM sources and are probably exaggerated.
Conflict with the PCE and PSUC
The POUM's independent communist position, including opposition to Stalin, caused huge ruptures with the PCE, which remained fiercely loyal to the Comintern. Moreover, these divisions, which included accusations of Trotskyism (and even fascism) by the Communists, resulted in actual fighting between their supporters; most notably, in 1937, a primarily Communist coalition of government forces attacked the POUM during the Barcelona May Days. While the larger Confederación Nacional del Trabajo (National Confederation of Labour, CNT) supported the POUM at first, the moderate leadership of the CNT dropped its support after it joined the government. Radical elements within the anarchist movement however fought side by side in the streets of Barcelona during the May Days and were isolated as well, like the Friends of Durruti. The POUM, along with the purely Trotskyist Seccion Bolshevik-Leninista, became isolated, and both organizations were driven underground. Nin was detained and presumably tortured to death by NKVD agents in Alcalá de Henares, Nin and his party were consistently labeled as provocateurs in Stalinist propaganda.
International links
The POUM was a member of the London Bureau of socialist and centrist Marxist parties that rejected both the reformism of the Second International and the pro-Moscow orientation of the Third International. Other members included the Independent Labour Party in Britain, the Workers and Peasants' Socialist Party (PSOP) in France, and Poale Zion. Its youth wing was affiliated to the International Bureau of Revolutionary Youth Organizations, through which it recruited the ILP Contingent in the Civil War. Foreign supporters of POUM during the Civil War included Lois Orr.
Transition era
During the Spanish transition to democracy, the POUM was legalized in 1977. This led to a split in the party, with one faction opposing formal legalization, calling for a boycott of the 1977 general election and demanding the immediate restoration of the republic. The legalized party participated in the election as part of the Front for Workers' Unity (FUT), a coalition of parties and organisations to the left of the PCE which won 0.22% of the nationwide vote. The election result led to a crisis for the POUM as well as for most parties to the left of the PCE, from which it was not able to recover.