In this magnificent synthesis of military, technological, and social history, William H. McNeill explores a whole millennium of human upheaval and traces the path by which we have arrived at the frightening dilemmas that now confront us. McNeill moves with equal mastery from the crossbow—banned by the Church in 1139 as too lethal for Christians to use against one another—to the nuclear missile, from the sociological consequences of drill in the seventeenth century to the emergence of the military-industrial complex in the twentieth.