House Un-American Activities Committee

Communist Control Act Bans Party Members from Union Leadership, Weaponizing Anti-Communism Against Labor

| Importance: 8/10

Congress passes the Communist Control Act of 1954, preventing members of the Communist Party from holding office in labor unions and other labor organizations. The legislation represents the culmination of systematic efforts to weaponize anti-communism against labor organizing, following the …

U.S. Congress Dwight Eisenhower House Un-American Activities Committee American Federation of Labor Congress of Industrial Organizations labor-suppression mccarthyism anti-communism red-scare union-busting +1 more
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Hollywood Blacklist Reaches Peak with Over 300 Industry Professionals Banned

| Importance: 7/10

By 1952, the Hollywood blacklist had reached its peak, with over 300 writers, directors, actors, and other film industry professionals banned from employment. What began with the Hollywood Ten’s 1947 contempt citations expanded through HUAC hearings, private “clearance” systems, …

Motion Picture Alliance for the Preservation of American Ideals Studio executives House Un-American Activities Committee American Legion FBI +1 more mccarthyism civil-liberties blacklist entertainment-industry first-amendment +1 more
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Hollywood Ten Released from Prison but Remain Blacklisted, Industry Persecution Continues

| Importance: 6/10

In early 1951, the Hollywood Ten—screenwriters and directors cited for contempt of Congress in 1947 for refusing to answer HUAC’s questions about Communist Party membership—were released after serving prison terms ranging from six months to one year. Their freedom from incarceration, however, …

Hollywood Ten Dalton Trumbo Ring Lardner Jr. John Howard Lawson House Un-American Activities Committee +1 more mccarthyism civil-liberties blacklist entertainment-industry first-amendment +1 more
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McCarran Internal Security Act Passes Over Truman Veto, Requires Communist Registration

| Importance: 8/10

President Harry Truman vetoes the Internal Security Act of 1950 (McCarran Act) on September 22, 1950, sending Congress a lengthy veto message criticizing specific provisions as “the greatest danger to freedom of speech, press, and assembly since the Alien and Sedition Laws of 1798,” a …

Pat McCarran Karl Mundt Harry Truman Hubert Humphrey U.S. Congress +4 more mccarthyism red-scare congressional-action civil-liberties huac +1 more
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Corporate Anti-Communist Network Coordinates Labor Suppression Through NAM, Chamber of Commerce Infrastructure

| Importance: 8/10

A sophisticated anti-communist network coordinated by the National Association of Manufacturers (NAM) and Chamber of Commerce reaches peak effectiveness in suppressing labor organizing during the early Cold War. The Hagley Museum and Library’s NAM collection contains extensive materials from …

National Association of Manufacturers Chamber of Commerce American Legion J.B. Matthews Hearst Corporation +1 more anti-communism labor-suppression corporate-propaganda red-scare union-busting +1 more
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CIO Expels United Electrical Workers and Farm Equipment Workers, Beginning Purge of Communist-Led Unions

| Importance: 9/10

The Congress of Industrial Organizations (CIO) holds its eleventh annual convention in Cleveland and expels two member unions, the United Electrical, Radio, and Machine Workers of America (UE) and the Farm Equipment Workers, for alleged “disloyalty to the CIO” and support for the …

Congress of Industrial Organizations Philip Murray Walter Reuther United Electrical, Radio and Machine Workers Farm Equipment Workers +1 more labor-suppression red-scare anti-communism union-busting mccarthyism +1 more
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Alger Hiss Testifies Before HUAC as Whittaker Chambers Accuses Him of Espionage

| Importance: 8/10

On August 3, 1948, Whittaker Chambers, a former Communist Party USA member, testified under subpoena before the House Un-American Activities Committee that Alger Hiss—a former State Department official who had accompanied FDR to Yalta—had secretly been a communist while in federal service. Hiss …

Alger Hiss Whittaker Chambers Richard Nixon House Un-American Activities Committee red-scare political-persecution surveillance-state institutional-corruption
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HUAC Hollywood Hearings Begin, Studio Executives Cooperate as "Friendly Witnesses"

| Importance: 9/10

The House Un-American Activities Committee opens its first postwar hearings on October 20, 1947, investigating alleged Communist influence in Hollywood with Chairman J. Parnell Thomas presiding and Robert E. Stripling serving as chief counsel. Drawing upon lists provided in The Hollywood Reporter, …

House Un-American Activities Committee J. Parnell Thomas Robert E. Stripling Walt Disney Jack L. Warner +8 more huac hollywood-blacklist mccarthyism red-scare corporate-complicity +1 more
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Executive Order 9835 Establishes Federal Loyalty Program - 5 Million Screened, Guilt Presumed

| Importance: 8/10

President Harry S. Truman signs Executive Order 9835 on March 21, 1947, nine days after announcing the Truman Doctrine, establishing the first general loyalty program in United States history designed to root out Communist influence in the federal government. The order mandates loyalty …

Harry S. Truman Federal Bureau of Investigation Civil Service Commission House Un-American Activities Committee civil-liberties mccarthyism red-scare surveillance loyalty-oath +1 more
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HUAC Made Permanent Standing Committee, Institutionalizes Political Persecution

| Importance: 8/10

On January 3, 1945, the House of Representatives votes to make the Dies Committee a permanent standing committee, renamed the House Un-American Activities Committee (HUAC). Mississippi Representative John Rankin, a virulent segregationist and antisemite, engineers the transformation through a …

House of Representatives John Rankin Martin Dies House Un-American Activities Committee red-scare political-persecution civil-liberties institutional-capture legislative-overreach
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