This is a list of socialist, communist, and anarchist internationals. An "International" — such as, the "First International", the "Second International", or the "Socialist International" — may refer to a number of multi-national communist, radical, socialist, or union organizations.

Historic internationals

• Communist League, created in 1847 from the League of the Just
• International Workingmen's Association (First International)
• Anarchist St. Imier International 1872 - 1877
• Second International
• International Working Union of Socialist Parties (2½ International) 1921-1923
• Comintern (Third International), 1919-1943
• Communist Workers International, 1922-mid 1920s
• Labour and Socialist International 1923-1940
• International Revolutionary Marxist Centre 1932-(1940s?)
• Provisional International Contact Commission for the New Communist (Fourth) International 1938 - 1946
• Fourth International 1938-disputed
• Situationist International 1957-1971

Existing internationals

• Black Bridge International (anarchist)
• International of Anarchist Federations (anarchist)
• International Bureau for the Revolutionary Party (left communist)
• International Communist Current (left communist)
• International Conference of Marxist-Leninist Parties and Organizations (Unity & Struggle) (Hoxhaist)
• International Conference of Marxist-Leninist Parties and Organizations (International Newsletter) (Maoist)
• International Workers Association (anarcho-syndicalist)
• reunified Fourth International (Trotskyist)
• Revolutionary Internationalist Movement (Maoist)
• Socialist International (Socialism, Social Democracy)
• World Socialist Movement (Marxist, anti-Leninist)
• International Marxist Tendency (Trotskyist)
• Other Trotskyist internationals

Proposed future internationals

• Fifth International

See also

• List of Trotskyist internationals

External links

• Lists of leftist organisations