Similar to 第五インターナショナル

List of left-wing internationals

Spanish Regional Federation of the IWA

International Workingmen's Association

Second International

Communist International

Fourth International

Far Eastern Bureau of the Communist International

Cominform

Profintern

International Working Union of Socialist Parties

Pan-Pacific Trade Union Secretariat

I Corps (South Korea)

2001 in politics

2015 in politics

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Asian Socialist Conference

International Federation of Trade Unions

Party of European Socialists

Young Communist International

International Union of Socialist Youth

International Red Aid

Revolutionary Communist International

Progressive Alliance