Fourth International (post-reunification)

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 and the International Committee, reunited, electing a United Secretariat of the Fourth International. 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.

Fourth International
AbbreviationFI, USFI or USec
PredecessorFourth International (1938)
FormationJune 1963
TypeAssociation of Trotskyist political parties
Region served
LeaderAlain Krivine, Olivier Besancenot, Éric Toussaint, Alan Thornett, etc.