Trotskyism is the political ideology and branch of Marxism developed by Russian revolutionary and intellectual Leon Trotsky along with some other members of the Left Opposition and the Fourth International. Trotsky described himself as an orthodox Marxist, a revolutionary Marxist, and a Bolshevik–Leninist as well as a follower of Karl Marx, Frederick Engels, Vladimir Lenin, Karl Liebknecht, and Rosa Luxemburg. His relations with Lenin have been a source of intense historical debate. However, on balance, scholarly opinion among a range of prominent historians and political scientists such as E.H. Carr, Isaac Deutscher, Moshe Lewin, Ronald Suny, Richard B. Day and W. Bruce Lincoln was that Lenin’s desired “heir” would have been a collective responsibility in which Trotsky was placed in "an important role and within which Stalin would be dramatically demoted ".
The Workers' Party of Marxist Unification was a Spanish communist party formed during the Second Republic and mainly active around the Spanish Civil War. It was formed by the fusion of the Trotskyist Communist Left of Spain and the Workers and Peasants' Bloc against the will of Leon Trotsky, with whom the former broke.
The Communist Party of Great Britain is a political group which publishes the Weekly Worker newspaper. The CPGB (PCC) claims to have "an internationalist duty to uphold the principle, 'One state, one party'. To the extent that the European Union becomes a state then that necessitates EU-wide trade unions and a Communist Party of the EU". In addition, it is in favour of the unification of the entire working class under a new Communist International. It is not to be confused with the former Communist Party of Great Britain, the Communist Party of Great Britain (Marxist–Leninist), or the current Communist Party of Britain.
Socialist Appeal was the British section of the International Marxist Tendency (IMT), founded in 1992 alongside the IMT by supporters of Ted Grant and Alan Woods after they were expelled from the Militant tendency of the Labour Party. In 2024 the Great Britain-based elements of the IMT were relaunched as the Revolutionary Communist Party.
The Communist Party of Spain (Marxist-Leninist) is a communist political party in Spain, formed in 1964 through the merger of splinter groups of the Communist Party of Spain (PCE).
The Labour Party Pakistan was a far-left political party and a leading labor union, closely allying associating with Fourth International.
Revolutionary Left is a Trotskyist political party in Spain formerly affiliated with the Committee for a Workers' International (CWI). Revolutionary left publishes El Militante in Spanish, Militant in Catalan and Euskal Herria Sozialista. They contain a socialist perspective on news and current issues. It campaigns for a party of the working class to express the political needs of those not benefiting from the capitalist system. They believe a strong and organized movement of workers and young people can overthrow capitalism and establish a new society. This can be achieved by taking banks and big businesses into public ownership and administering them through democratic control and management.
The International Marxist Group (IMG) was a Trotskyist group in Britain between 1968 and 1982. It was the British Section of the Fourth International. It had around 1,000 members and supporters in the late 1970s. In 1980, it had 682 members; by 1982, when it changed its name to the Socialist League, membership had fallen to 534.
Left communism, or the communist left, is a position held by the left wing of communism, which criticises the political ideas and practices espoused by Marxist–Leninists and social democrats. Left communists assert positions which they regard as more authentically Marxist than the views of Marxism–Leninism espoused by the Communist International after its Bolshevization by Joseph Stalin and during its second congress.
The Revolutionary Workers' Party is a Russian Trotskyist organisation established in 1999. From 2002 to 2011 there were two active organisations called the 'Revolutionary Workers' Party'. In April 2011, activists from one of the two, centred in Perm, merged their organisation into the Russian Socialist Movement. In May 2019 part of the RWP split and merged into the International Marxist Tendency, naming themselves Marxist Tendency.
The Committee for a Workers' International (CWI) was an international association of Trotskyist political parties and organisations. Today, two groups claim to be the continuation of the CWI, the refounded Committee for a Workers' International and International Socialist Alternative.
Edward Grant was a South African Trotskyist who spent most of his adult life in Britain. He was a founding member of the group Militant and later Socialist Appeal.
Alan Woods is a British Trotskyist political theorist and author. He is one of the leading members of the Revolutionary Communist International (RCI) and was a founder of Socialist Appeal. He is political editor of the RCI's In Defence of Marxism website. Woods was a leading supporter within the Militant tendency within the Labour Party and its parent group the Committee for a Workers' International until the early 1990s. A series of disagreements on tactics and theory led to Woods and Ted Grant leaving the CWI, to found the Committee for a Marxist International in 1992. They continued with the policy of entryism into the Labour Party. Woods has expressed particularly vocal support for the Bolivarian Revolution in Venezuela, and repeatedly met with the Venezuelan President Hugo Chávez, leading to speculation that he was a close political adviser to the president.
The International Socialist Tendency (IST) is an international grouping of unorthodox Trotskyist organisations espousing the ideas of Tony Cliff (1917–2000), founder of the Socialist Workers Party (SWP) in Britain. IST supporters are sometimes called "Cliffites". It has sections across 27 countries; however, its strongest presence is in Europe, especially in Britain.
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 Marxist Tendency was a Trotskyist organization in Russia, created in May 2019 as a result of the merger of the Russian section of the International Marxist Tendency with a faction of the Revolutionary Workers' Party. According to its own statements, the MT is a communist organization that is "working to create national sections of the IMT in the territory of the former USSR."
