Kazan testified before the House Committee on Un-American Activities (HCUA) in 1952, during the postwar era that journalist Michael Mills, calls "arguably the most controversial period in Hollywood history." When Kazan was in his mid-20s, during the Depression years 1934 to 1936, he had been a member of the American Communist Party in New York, for a year and a half.
In April 1952, the Committee called on Kazan, under oath, to identify Communists from that period 16 years earlier. Kazan initially refused to provide names, but eventually named eight former Group Theatre members who he said had been Communists: Clifford Odets, J. Edward Bromberg, Lewis Leverett, Morris Carnovsky, Phoebe Brand, Tony Kraber, Ted Wellman, and Paula Miller, who later married Lee Strasberg. He testified that Odets quit the party at the same time that he did. Kazan claimed that all the persons named were already known to HCUA, although this has been contested. Kazan recounts how he received a letter detailing how his naming of Art Smith (actor) damaged the actor's career. Kazan's naming names cost him many friends within the film industry, including playwright Arthur Miller, although Kazan notes the two did work together again.
His controversial stand during his testimony in front of the House Committee on Un-American Activities (HCUA) in 1952, became the low point in his career, although he remained convinced that he made the right decision to give the names of Communist Party members. He stated in an interview in 1976 that "I would rather do what I did than crawl in front of a ritualistic Left and lie the way those other comrades did, and betray my own soul. I didn't betray it. I made a difficult decision."