House Un-American Activities Committee

The House Un-American Activities Committee (HUAC), formally the House Committee on Un-American Activities, was a standing committee of the United States House of Representatives that investigated alleged disloyalty and subversive activity by private citizens, public employees, and organizations between 1938 and 1975. Established as a special committee on 26 May 1938 and made permanent in January 1945, HUAC initially examined both fascist and communist activity but quickly came to focus overwhelmingly on suspected communist influence in government, labor unions, and the entertainment industry. In 1969 it was renamed the House Committee on Internal Security, and it was abolished in 1975, with its functions transferred to the House Judiciary Committee. HUAC is closely associated with McCarthyism, though Senator Joseph McCarthy, for whom the term is named, was never a member of the committee, as McCarthy served in the Senate rather than the House. Whether HUAC's investigations represented a necessary response to genuine espionage and subversion or an overreaching assault on civil liberties remains contested; see house-un-american-activities-committee-viewpoint pages below.

Historians broadly agree on HUAC's institutional timeline and major cases, including the 1947 hearings into alleged communist influence in Hollywood that produced the blacklisting of the “Hollywood Ten,” and the 1948 investigation of former State Department official Alger Hiss, in which Congressman Richard Nixon played a prominent role. Disagreement persists, however, over how to characterize the committee's net effect: some accounts emphasize documented instances of Soviet espionage that HUAC's investigations helped expose, while others emphasize the committee's record of unsubstantiated allegations, due-process violations, and chilling effects on speech and association. These interpretive disputes are addressed in the Viewpoints and Controversies sections below. For the committee's institutional development from its 1930s predecessor committees through its 1975 abolition, see house-un-american-activities-committee-history.

• Vindicationist viewpoint - Holds that HUAC performed a legitimate and ultimately vindicated function by exposing real instances of communist infiltration and Soviet espionage in American institutions, citing later evidence such as Soviet archival material and the Venona decryptions. See house-un-american-activities-committee-vindicationist-viewpoint.
• Civil liberties critique - Holds that HUAC systematically violated First and Fifth Amendment protections, relied on guilt by association and unverified testimony, and caused disproportionate harm to careers and reputations relative to any security benefit achieved. See house-un-american-activities-committee-civil-liberties-viewpoint.
• Institutional overreach viewpoint - Focuses less on the truth or falsity of individual allegations and more on the argument that a legislative committee lacking judicial safeguards was structurally unsuited to adjudicate questions of loyalty, regardless of intent. See house-un-american-activities-committee-institutional-overreach-viewpoint.
• Partisan-instrument viewpoint - Holds that HUAC functioned primarily as a vehicle for opposing the New Deal and organized labor, with anticommunism serving as a pretext rather than the committee's central motivation. See house-un-american-activities-committee-partisan-instrument-viewpoint.

• Hollywood blacklist controversy - HUAC's 1947 hearings into the film industry led to the imprisonment of the “Hollywood Ten” for contempt of Congress and a broader industry blacklist affecting hundreds of writers, directors, and actors. See house-un-american-activities-committee-hollywood-blacklist-controversy.
• Alger Hiss case - HUAC's investigation of Hiss, a former State Department official accused by Whittaker Chambers of espionage, produced a perjury conviction and decades of subsequent historical and political dispute over Hiss's guilt. See house-un-american-activities-committee-alger-hiss-controversy.
• Japanese American internment hearings controversy - A 1943 subcommittee investigation into the War Relocation Authority drew on claims of Japanese American disloyalty that were later discredited, and several members supported continued internment-related measures. See house-un-american-activities-committee-japanese-american-internment-controversy.

• house-un-american-activities-committee-history - institutional history from the Overman and Fish Committees through HUAC's 1975 abolition
• house-un-american-activities-committee-vindicationist-viewpoint
• house-un-american-activities-committee-civil-liberties-viewpoint
• house-un-american-activities-committee-institutional-overreach-viewpoint
• house-un-american-activities-committee-partisan-instrument-viewpoint
• house-un-american-activities-committee-hollywood-blacklist-controversy
• house-un-american-activities-committee-alger-hiss-controversy
• house-un-american-activities-committee-japanese-american-internment-controversy
• McCarthyism
• Richard Nixon
• red-scare

1. Walter Goodman, The Committee: The Extraordinary Career of the House Committee on Un-American Activities (New York: Farrar, Straus and Giroux, 1968).
2. Eric Bentley, ed., Thirty Years of Treason: Excerpts from Hearings Before the House Committee on Un-American Activities, 1938-1968 (New York: Viking, 1971).
3. August Raymond Ogden, The Dies Committee: A Study of the Special House Committee for the Investigation of Un-American Activities, 1938-1944 (Washington, D.C.: Catholic University of America Press, 1945).
4. Kenneth O'Reilly, Hoover and the Un-Americans: The FBI, HUAC, and the Red Menace (Philadelphia: Temple University Press, 1983).
5. Martin H. Redish, The Logic of Persecution: Free Expression and the McCarthy Era (Stanford, Calif.: Stanford University Press, 2005).
6. U.S. House of Representatives, Office of the Historian, “The permanent standing House Committee on Un-American Activities,” History, Art & Archives, accessed June 27, 2026, https://history.house.gov/Historical-Highlights/1901-1950/The-permanent-standing-House-Committee-on-Un-American-Activities/.
7. National Archives and Records Administration, “Records of the House Committee on Un-American Activities (HUAC),” accessed June 27, 2026, https://www.archives.gov/legislative/research/getting-started/huac-records.