Fourth International (Posadist)

The Fourth International Posadist is a Trotskyist international. It was founded in 1962 by J. Posadas, who had been the leader of the Latin America Bureau of the Fourth International in the 1950s, and of the Fourth International's section in Argentina.

When the Fourth International (FI) split in 1953, Posadas and his followers sided with Michel Pablo and the International Secretariat of the Fourth International (ISFI). The Posadists began quarrelling with the majority of the ISFI in 1959 over the question of nuclear war with Posadas being a proponent as, he claimed, it would destroy capitalism and clear the way for socialism. The Posadists finally split with the ISFI in 1962 to form the Fourth International (Posadist). The group initially had a following in several countries, particularly among railway workers in Cuba, tin workers in Bolivia and farm workers in Brazil. At its peak in the late 1960s the Posadists had approximately 1,000 members worldwide.

There was a significant Posadist group in Cuba. Posadist guerrillas fought alongside Castro and Che Guevara in the 1959 revolution. When the Posadists split from the Fourth International in 1962 they took the Cuban section with them, meaning no other Trotskyist group was represented in Cuba in the 1960s.

The Posadist group was accused by Soviet-friendly forces in Cuba of arguing that the Cuban government should forcibly expel the American military base at Guantanamo Bay and of trying to organize workers in the town of Guantánamo to march on the nearby military base. That was taken as a justification by the government for imposing a ban on them, Castro denouncing their influence as "pestilential" at the Tricontinental Congress held in January 1966. Cuban Posadists went on to claim that Castro had Guevara killed when, it turned out, he was actually in Bolivia fighting with the guerrilla movement there. Conversely, after Guevara was executed by Bolivian authorities, Posadas claimed in 1967 that Che Guevara was not actually dead but was being kept in prison by Castro's government.

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