In The Trotskyist Movement
Posadas became the leader of the Latin America Bureau of the Fourth International and, under his guidance, the movement gained some influence in the region, particularly among Cuban railway workers, Bolivian tin miners and agricultural workers in Brazil.
When the Fourth International split in 1953, Posadas and his followers sided with Michel Pablo and the International Secretariat of the Fourth International. By 1959, however, he and his followers were quarrelling with the leadership of the ISFI accusing them of lacking confidence in the possibility of revolution. They also differed over the issue of nuclear war with Posadas taking the view that "War–Revolution" would "settle the hash of Stalinism and Capitalism" and that nuclear war was inevitable and desirable as a socialist society would rise from the ashes. Posadas and his international followers, who were concentrated in Latin America, split from the ISFI in 1962 prior to its reunification with the International Committee of the Fourth International which formed the United Secretariat of the Fourth International.
Read more about this topic: J. Posadas