The sounds of speech, preaching, marches, confrontation, music, and song reverberated through the iconic year of 1968. On its 50th anniversary, we bring together three powerful voices for a discussion of acting, speaking, and singing out: film star Peter Coyote, founding member of the Diggers and director of the guerrilla theater San Francisco Mime Troupe; the activist protestant minister Rev. Dr. William J. Barber II, whose Moral Mondays movement has hinged on his incantatory preaching, and Prof. Andrea Bohlman, a musicologist whose research centers on the political stakes of music...