Evan after I had replaced my civil-libertarian posture with the rigors of Marxism-Leninism, Chinese style, Clark's [Foreman] advice about the necessity of maintaining individual freedoms stuck in my mind and often forced me into open conflict with Progressive Labor. In many ways it was the need for independence, which Clark helped to instill in me, that led to my eventual break with Communism.

p. 29 - The New Left: The Resurgence of Radicalism Among American Students (1966)