The most notable examples of McCarthyism include the speeches, investigations, and hearings of Senator McCarthy himself; the Hollywood blacklist, associated with hearings conducted by the House Un-American Activities Committee (HUAC); and the various anti-communist activities of the Federal Bureau of Investigation (FBI) under Director J. Edgar Hoover. McCarthyism was a widespread social and cultural phenomenon that affected all levels of society and was the source of a great deal of debate and conflict in the United States.