The frightening vision of a Third World War has gripped the United States since even before the Second World War ended. When might the next global conflict start? How might it be fought? And what might a post-WWIII world look like? Throughout the Cold War and beyond, politicians, diplomats, military officials, scientists, religious ministers, fiction writers, peace activists, and ordinary citizens have all been struggling to anticipate, plan, survive, or prevent the world war that is yet to come.