The Third International was created by Lenin and Trotsky as an instrument of world revolution. However, as Ted Grant wrote in 1943, the Comintern under Stalin quickly degenerated "into a kept whore of the Stalinist bureaucracy, applying its policy according to the changing moods of Kremlin policy. In reality the creation of the International was not a question of sentiment or convenience, but arose directly from the objective tasks posed in front of the international working class."
Read the full article in the Ted Grant Archive.