For medieval and early modern Christians, the problem of the lie was the problem of human existence itself. To ask "Is it ever acceptable to lie?" was to ask how we, as sinners, should live in a fallen world. As it turns out, the answer to that question depended on who did the asking. The Devil Wins uncovers the complicated history of lying from the early days of the Catholic Church to the Enlightenment, revealing the diversity of attitudes about lying by considering the question from the perspectives of five representative voices--the Devil, God, theologians, courtiers, and women. Examining works by Augustine, Bonaventure, Martin Luther, Madeleine de Scudéry, Jean-Jacques Rousseau, and a host of others, Dallas G. Denery II shows how the lie, long thought to be the source of worldly corruption, eventually became the very basis of social cohesion and peace.