The First International of 1864-1872 was composed of the full range of socialists, from anarchists, to marxists, to non-Marxist socialists. The Second International excluded the anarchists and was composed of various wings of social democracy. It lasted from 1889 to World War II. The Third International was exclusively communist, excluding both anarchists and social democrats. Many non-Leninist socialists consider the Third International overly controlled by the Communist Party. This panel discusses what the Third International was and wasn’t from a Leninist viewport.