In 1947, as the House Committee on Un-American Activities probed communist influence in the film industry, Corwin joined other Hollywood notables in organizing resistance to what they viewed as a threat to free expression.
"Hollywood Fights Back," which Corwin co-wrote and co-directed, featured an array of famous Hollywood names such as Humphrey Bogart, Judy Garland and Danny Kaye, who expressed their fears of where the congressional investigation might lead.
"Who comes after us?" actor Fredric March read from the script. "Is it your minister who will be told what he can say in his pulpit? Is it your children's school teacher who will be told what she can say in a classroom? Who are they after? They are after more than Hollywood. This reaches into every American city."
Corwin moved to Los Angeles permanently in 1948 — the year after he married Broadway actress Katherine Locke — and initially worked primarily as a radio dramatist and screenwriter.
He received an Academy Award nomination in 1957 for his adaptation of Irving Stone's biography of artist Vincent Van Gogh, "Lust for Life," starring Kirk Douglas.
He wrote occasionally for television and the theater — as well as writing books, poems, essays and a column for Westways magazine, "Corwin on Media."
For many years, he served as an adjunct professor in the USC School of Journalism and continued to teach until his 100th birthday.
In 2006, a short documentary on Corwin, "A Note of Triumph: The Golden Age of Norman Corwin," won an Academy Award.
Corwin, who outlived most of his colleagues and contemporaries, had longevity in his genes. His British immigrant father, Sam, a printer and inveterate reader whose love of the printed word inspired his son, died in 1987 — at 110.
Corwin, whose wife died in 1995, is survived by two children, Diane and Anthony.