Endore supported non-governmental drug rehab programs and became a devoted proponent of the Synanon Foundation, a controversial southern California commune dedicated to reforming and rehabilitating drug addicts and alcoholics (later, as the Church of Synanon, it started its own utopian social movement). He composed pamphlets and a published history of the commune, Synanon. He also taught fiction writing at the Los Angeles People's Education Center, a CPUSA offshoot of the New York Workers School.
