Martin Luther King, Jr.’s anti-war speech, “Beyond Vietnam,” is a noteworthy example of deliberation by dissent from the margins. Attention is given to the formation of his moral argument from similitude, its foundation in metaphor and archetypal imagery, and how it shifted perspective to enable the introduction of alternative lines of argument. King’s argumentation, as it worked rhetorically toward making the war debatable, exhibited key features of deliberative dissent, including catachresis, contingency, perspective, and incommensurability.