His romance with Communism ended six years later, when he quit the party after feeling pressure to bend his writing to fit its doctrines.
Mr. Schulberg had been identified as a party member in testimony before the House committee. Called to testify, he publicly named eight other Hollywood figures as members, including the screenwriter Ring Lardner Jr. and the director Herbert Biberman.
They were two among the Hollywood 10 — witnesses who said the First Amendment gave them the right to think as they pleased and keep their silence before the committee. All were blacklisted and convicted of contempt of Congress. Losing their livelihoods, Lardner served a year in prison and Biberman six months.
In the turmoil of the Red Scare, Mr. Schulberg’s testimony was seen as a betrayal by many, an act of principle by others. The liberal consensus in Hollywood was that Lardner had acquitted himself more gracefully before the committee when asked if he had been a Communist: “I could answer it, but if I did, I would hate myself in the morning.”
In the 2006 interview, Mr. Schulberg said that in hindsight he believed that the attacks against real and imagined Communists in the United States were a greater threat to the country than the Communist Party itself. But he said he had named names because the party represented a real threat to freedom of speech.
“They say that you testified against your friends, but once they supported the party against me, even though I did have some personal attachments, they were really no longer my friends,” he said. “And I felt that if they cared about real freedom of speech, they should have stood up for me when I was fighting the party.”
The Times web site has the video of a 2006 interview.