The perceived threat from Moscow predates McCarthy. It began almost from time the Bolsheviks established the world’s first socialist state in November 1917. Like elsewhere in the world, it had a major impact in the US, initially giving rise to militant trade unionism but subsequently also drawing a large number of progressive people into the USCP, among them artistes and creative personalities from Hollywood. Major international developments influenced the waxing or waning of official US attitudes towards Communism. It was deplored during the Stalinist purges and ‘show trials’ (and the Nazi-Soviet non-aggression pact) during the ’30s, and accepted uneasily after 1941, when the Soviets were partners in fighting fascism. After the war, Russia’s acquisition of the atom bomb and the Communist victory in China in 1949, followed by the Korean War in 1950 created an anti-Communist mood in the US. This helped McCarthy and others in the US establishment—both in the executive as well as in the Congress—to go after Communist sympathisers in Hollywood. A number of leading personalities like John Huston, Humphrey Bogart, Katherine Hepburn, Charlie Chaplin, Bertolt Brecht, Judy Garland, Danny Kaye and others were victims of the witch-hunt.