Likewise, the editor of "The New Republic" magazine, Malcolm Cowley had been a fellow traveler during the 1930s, but broke from the Communist Party, because of the ideological contradictions inherent to the Molotov–Ribbentrop Pact (Treaty of Non-aggression between Germany and the Union of Soviet Socialist Republics, 23 August 1939). The novelist and critic Waldo Frank was a fellow traveler during the mid-1930s, and was the chairman of the League of American Writers, in 1935, but was ousted as such, in 1937, when he called for an impartial enquiry to the reasons for Joseph Stalin's purges (1936–38) of Russian society.