Trotskyism is the political ideology and branch of Marxism developed by Russian revolutionary Leon Trotsky and some other members of the Left Opposition and Fourth International. Trotsky described himself as an orthodox Marxist, a revolutionary Marxist, and a Bolshevik–Leninist as well as a follower of Marx, Engels, Vladimir Lenin, Karl Liebknecht, and Rosa Luxemburg.
The Fourth International (FI) was established in France in 1938 by Leon Trotsky and his supporters, having been expelled from the Soviet Union and the Communist International.
The Workers Socialist League (WSL) was a Trotskyist group in Britain. The group was formed by Alan Thornett and other members of the Workers Revolutionary Party (WRP) after their expulsion from that group in 1974.
The Workers Internationalist League was a Trotskyist group in Britain founded in the summer of 1983 by the Internationalist Faction of the Workers Socialist League. It was the British affiliate of the Trotskyist International Liaison Committee until that body was renamed the International Trotskyist Committee.
The Fourth International Posadist is a Trotskyist international organisation. It was founded in 1962 by J. Posadas, who had been the leader of the Latin America Bureau of the Fourth International in the 1950s, and of the Fourth International's section in Argentina. Between their split from the International Secretariat of the Fourth International in 1962 and Posadas' death in 1981, Posadists developed a strain of communism that included several fringe ideas, which brought them into conflict with more mainstream left-wing groups.
The Socialist Workers League was a group of Israeli Trotskyists, founded in 2002 and dissolved in 2004. The SWL was built as a result of a split initiated by Trotskyists who were part of the Israeli Committee for One Democratic Republic of Palestine. The prominent member of the SWL was Yossi Schwartz, former member of the leadership of the Canadian section of the International Communist League, known as the international Spartacist tendency, the Trotskyist League (Canada). The Trotskyists, led by Schwartz, believed that only a program that struggles for a socialist Palestinian republic can unite the Palestinian Arab workers and peasants of the region.
The Movement for Socialism is a Trotskyist political party in Argentina. It was founded in 1982 and led by Nahuel Moreno until his death, in 1987.
The Revolutionary Socialist Workers' Party is a Trotskyist party in Turkey. It was founded by Şevket Doğan Tarkan and his friends from Trotskyist journal Socialist Worker in 1997. The group had links to far-left Kurtuluş Hareketi before the 1980 Turkish coup d'état.
The Workers' Socialist Movement, known for many years as the Workers' Socialist Party, is a Trotskyist political party in Bolivia. PST/MST was affiliated to LIT-CI for a long period.
The Workers' Socialist Movement is a Puerto Rican democratic socialist revolutionary organization, formed in 1982 and dedicated to the self-organization and self-emancipation of the working-class in Puerto Rico, as well as international solidarity with the workers struggles worldwide. It is usually known as the "MST", and its youth section is the Unión de Juventudes Socialistas, also known as the "UJS-MST" or simply "UJS". The MST supports a socialist and independent Puerto Rico.
Socialist Left, officially registered as the Left for a Socialist Option, is a Trotskyist political party in Argentina. It was founded in 2006 as a split from the Socialist Workers' Movement. It is the Argentine section of International Workers' Unity – Fourth International. It is one of three parties that make up the Workers' Left Front.
The International Committee of the Fourth International (ICFI) is the name of two Trotskyist internationals; one with sections named Socialist Equality Party which publishes the World Socialist Web Site, and another linked to the Workers Revolutionary Party in the UK.
The Socialist Equality Party (SEP) is a Trotskyist political party in the United States, one of several Socialist Equality parties around the world affiliated with the International Committee of the Fourth International (ICFI). The ICFI publishes daily news articles, perspectives and commentaries on the World Socialist Web Site and maintains Mehring Books as publishing house.
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.
Nahuel Moreno was a Trotskyist leader from Argentina. Moreno was active in the Trotskyist movement from 1942 until his death.
The Committee for a Workers' International (CWI) was an international association of Trotskyist political parties. Today, two groups claim to be the continuation of the CWI.
The Socialist Workers Party (SWP) is a Trotskyist communist party in the United States. The SWP began as a group that was expelled from the Communist Party USA for supporting Leon Trotsky over Soviet leader Joseph Stalin.
Orthodox Trotskyism is a branch of Trotskyism which aims to adhere more closely to the philosophy, methods and positions of Leon Trotsky and the early Fourth International, Vladimir Lenin and Karl Marx than other avowed Trotskyists.
Far-left politics in the United Kingdom have existed since at least the 1840s, with the formation of various organisations following ideologies such as Marxism, revolutionary socialism, communism, anarchism and syndicalism.
The International Socialist League (ISL-LIS) is an international political organization made up of national revolutionary socialist and Trotskyist parties and organizations from five continents.
