Fourth International (post-reunification)

Fourth International
Abbreviation	FI, USFI, or USec
Founded	July 1963; 60 years ago (1963-07)
Preceded by	Fourth International (1938)
Headquarters	Paris
Newspaper	International Viewpoint
Ideology	Communism Trotskyism
Political position	Far-left
Website
fourth.international

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The Fourth International (FI), founded in 1938, is a Trotskyist international. In 1963, following a ten-year schism, the majorities of the two public factions of the Fourth International, the International Secretariat (ISFI) and the International Committee (ICFI), reunited, electing a United Secretariat of the Fourth International (USFI or USec).

In 2003, the United Secretariat was replaced by an Executive Bureau and an International Committee, although some other Trotskyists still refer to the organisation as the USFI or USec.