Fourth International–Posadist
Trotskyist faction founded 1962 by J. Posadas

The Fourth International–Posadist (Spanish: Cuarta Internacional Posadista) is a Trotskyist international organisation whose followers are known as Posadists (). 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.
Between their split from the International Secretariat of the Fourth International in 1962 and Posadas' death in 1981, Posadists developed a strain of communism, known as Posadism, that included several fringe ideas, which brought them into conflict with more mainstream left-wing groups.
Posadism attempts to introduce elements of ufology into Marxist thought. Arguing that only communism can allow the development of interplanetary travel, they concluded that visiting aliens from other planets must live in highly advanced communist societies and are bound to help Earth-based communists with bringing about the world revolution.
History
Origins
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.
There was a significant Posadist group in Cuba.
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