J. Posadas

J. Posadas (1912–1981) (occasionally referred to as Juan Posadas), was the pseudonym of Homero Rómulo Cristalli Frasnelli, an Argentine Trotskyist whose personal vision is usually described as Posadism.

Born in Argentina to Italian immigrants from the Southern town of Matera, he gained fame playing football for Estudiantes de La Plata in his youth. In the 1930s he worked as a shoemaker and organised a shoemakers’ and leather workers’ union in Córdoba, Argentina.

During this period he stood as a candidate for election in Buenos Aires province for the Partido Socialista Obrero (). He then joined the Partido de la Revolución Socialista, which affiliated to the Fourth International in 1941.

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 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.

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