In the “Afterword” to the book “Out Now! A Participant’s Account of the Movement in the U.S. to End the Vietnam War,” author Fred Halstead summarized the main challenges of building this movement, the key characteristics that allowed it to involve millions — including within the U.S. military, and its significance in the 1975 defeat of Washington’s war machine in Southeast Asia. As new imperialist wars shake the stability of the capitalist system, all generations seeking social justice will be better equipped to face today’s challenges by studying the lessons outlined in Out Now! — succinctly summarized in the book’s “Afterword,” from which we are publishing excerpts. This is the second of two parts.