Answer:
The Cold War revived the anti-communist hysteria that had gripped the United States after World War I. In 1947 Congress revived the House Committee on Un-American Activities (HUAC), opposed by Herb Block since its inception in the 1930s and declared by President Truman to be itself the most un-American activity. Herb Block comments: "The FBI, under J. Edgar Hoover, helped provide the committee with material from its aptly named ‘raw files'. Some producers, directors and screen writers refused to testify or to play the ‘name game' in which the committee demanded the names of associates, who could then be called on to name others thus providing an ever-expanding list of suspects to be summoned.
