On January 3, 1521, Pope Leo X signed the papal bull Decet Romanum Pontificem, formally excommunicating Martin Luther from the Catholic Church and igniting the Protestant Reformation. What began with Luther's Ninety-Five Theses, challenging the sale of indulgences, had escalated into a fundamental conflict about religious authority, Scripture interpretation, and individual conscience. Pope Leo believed he was preserving Christian unity and protecting the faithful from heresy. Martin Luther thought he was defending true Christianity against corruption and restoring the church to biblical principles. Both men were sincere. Both were partially right. And their collision triggered religious wars that killed millions while simultaneously creating the foundation for modern religious freedom. This episode explores the impossible choices both men faced, the theological and political forces that made compromise impossible, and why the tension between conscience and institutional authority still defines our world today.