J. Posadas

Homero Rómulo Cristalli Frasnelli (January 20, 1912 – May 14, 1981), better known under the pseudonym J. Posadas or sometimes Juan Posadas (Spanish: [ˈxwan poˈsaðas]), was an Argentine Trotskyist whose personal vision is usually described as Posadism. Originally a collective pen name of the leadership of the Grupo Cuarta Internacional (GCI) in Argentina in the 1940s, it was also used by Dante Minazzoli initially.