Zinn wrote one of the earliest books calling for the U.S. withdrawal from its war in Vietnam. "Vietnam: The Logic of Withdrawal" was published by Beacon Press in 1967 based on his articles in "Commonweal", "The Nation," and "Ramparts". In the opinion of Noam Chomsky, "The Logic of Withdrawal" was Zinn's most important book:"He was the first person to say—loudly, publicly, very persuasively—that this simply has to stop; we should get out, period, no conditions; we have no right to be there; it's an act of aggression; pull out. It was so surprising at the time that there wasn't even a review of the book. In fact, he asked me if I would review it in "Ramparts" just so that people would know about the book."