He was a central figure in the experimental theater movement for decades. His best-known work, a trilogy of one-acts, opened in 1966 and ran for more than 630 performances.He was a central figure in the experimental theater movement for decades. His best-known work, a trilogy of one-acts, opened in 1966 and ran for more than 630 performances.Read MoreTheater, Writing and Writers, Deaths (Obituaries), La MaMa ETC, van Itallie, Jean-Claude, America Hurrah (Play)