Peace psychology in North America has been shaped by geohistorical forces emerging during the Cold War, a period when the United States and Soviet Union were engaged in an arms race and competed for global hegemony. But the roots of peace psychology are much deeper. This article will use a historical lens and identify the contributions of North American psychologists to peace psychology. More details can be found in Christie, Wagner, and Winter (2001).      Keywords:    William James,  “the moral equivalent of war”,  peace and conflict: journal of peace psychology,  morale,  clinical psychologists,  human factors psychologists,  social psychologists,  psychologists' manifesto: human nature and the peace,  seville statement on violence,  authoritarian personality,  systematic desensitization,  deterrence,  diabolical enemy image,  security dilemma,  mutually assured destruction,  contact hypothesis,  nonviolent disposition,  civil rights,  women's movement,  groupthink,  effort justification,  limited nuclear war,  evil empire,  ethnopolitical conflict,  cycle of violence,  terrorism,  principled negotiation,  unofficial diplomacy,  direct violence,  structural violence