The Great Purge encouraged Hook’s increasing ambivalence toward Marxism. In 1939, Hook formed the Committee for Cultural Freedom, a short-lived organization that set the stage for his postwar politics by opposing “totalitarianism” on the left and right. By the Cold War, Hook had become a prominent anti-Communist, although he continued to consider himself both a democratic socialist and a secular humanist throughout his life. He was, therefore, an anti-Communist socialist. In 1973 he was one of the signers of the Humanist Manifesto II.[6] — Wikipedia article about Sidney Hook. Communism definitely gave socialism a bad name.