The Fourth International was established in France in 1938 by Trotsky and his supporters. The Trotskyists considered the Third International as effectively puppets of Stalinism. The Fourth International suffered a major split in 1940 and an even more significant schism in 1953. A partial reunification of the schismatic factions occurred in 1963, but the organization never recovered sufficiently. The current incarnation of the Fourth International does not operate as a cohesive entity.
About Fourth International in brief

Although the Third. International was reformed in 1889, it was still regarded as the centralist component on which they fought to fight the capitalist system. The Third International disbanded in 1876 and was replaced by the Socialist International which was organised by the Communist Party of the United States of America (C.A.U.S.A). This was the basis for the International Socialist Party (ISP), which was formed in 1894. The ISP was the first political organisation of its kind to be organised on the basis of a democratic, centralist, democratic and socialist programme. It was also the first organisation to be established on a national basis, and was based in New York City, New York, and London. The PSI was founded in 1903 and was the inspiration for the Socialist Party of Great Britain (SPGB). The PSGB was the precursor to the British Communist Party (BCP) and the Socialist Workers Party (SWP). The P.C.P. was the predecessor to the Socialist Labour Party (SLP), founded in 1913 and based in London, London, Paris, Berlin and Moscow. The PSC was the forerunner of the Socialist National Party (SNP) which was founded on the principles of the International Workers’ Party (ITP) The PNC was the founder of the World Socialist Party, which was based on the Russian Communist Party and the Internationalist Party (ICP). It was founded by Trotsky in 1921 and was known as the ‘Left Opposition’ or ‘Trotskyists’ The PSP was expelled from the Soviet Union in 1928 and Trotsky was exiled to Turkey in 1928.
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