List of left-wing internationals

This is a list of socialist, communist, and anarchist internationals.

• Communist League, created in 1847 from the League of the Just.
• International Workingmen's Association (First International)
• Socialist International (Second International), a collection of moderate leftist political parties.
• Comintern (Third International), created in 1917 at the behest of the Communist Party of the Soviet Union.
• Fourth International, created in 1938 by Leon Trotsky.

• International Federation of Anarchists (anarcho-communist)
• International Leninist Current (Leninist)
• International Workers Association (anarcho-syndicalist)
• World Socialist Movement (Marxist, anti-Leninist)

Lists of internationals

• List of left communist internationals
• List of Trotskyist internationals