Fourth International Posadist

A radical Trotskyist faction known for its unique blend of revolutionary politics, ufology, and apocalyptic optimism.


The Fourth International Posadist, established by J. Posadas in 1962, represents one of the more esoteric branches of Trotskyism. Initially part of the broader Fourth International, Posadists diverged significantly in ideology and tactics, notably for their involvement in the Cuban revolution alongside Castro and Guevara, and later for their controversial stances on global politics and extraterrestrial life​​.

The Posadists were characterized by their intense interest in UFOs, interpreting these sightings as evidence of advanced socialist civilizations on other planets. This fascination marked a distinct shift in the group’s focus during the late 1960s and contributed to its eventual decline in influence following Posadas’ death in 1981. Despite dwindling numbers, the group’s legacy persisted, experiencing a resurgence of interest in recent years through social media and various “neo-Posadist” movements​​.

Posadism advocated for a proletarian revolution leading to a socialist state, echoing Marxist theory. However, its founder, Posadas, held several unconventional beliefs, such as the inevitability of nuclear war as a precursor to global socialism and the role of scientific progress and space exploration in achieving a utopian future. He envisaged a society where humanity, liberated from capitalist constraints, would harness science for the common good, advancing to the point of childbearing in space and direct engagement with extraterrestrial beings​​.

The Posadist Fourth International continues to uphold these principles, seeing itself as part of the world Communist movement while maintaining fidelity to Trotsky’s foundational aims. It emphasizes participation in the organization of revolutionary forces emerging post-World War II and supports various international causes aligned with leftist and anti-imperialist sentiments​​.

One aspect of Posadas that stood out was his charisma and leadership style, which combined intellectual rigor with a personal touch that drew comparisons to cult leaders. His approach to organizing and mobilizing followers was marked by a deep commitment to the class struggle, positioning him as a central figure within his movement​​.

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