Coordinating body established by labour and
socialist organizations, including: First
International or International Working Men's
Association 1864-72, formed in London under
Karl Marx. Second International 1889-1940,
founded in Paris. Third (Socialist)
International or Comintern 1919-43, formed in
Moscow by the Soviet leader Lenin, advocating
from 1933 a popular front (communist,
socialist, liberal) against the German
dictator Hitler.
Fourth International or Trotskyist
International 1
936, somewhat indeterminate, anti-Stalinist.
Revived Socialist International 1951, formed
in Frankfurt, West Germany, a largely
anti-communist association of social
democrats.