Martin Luther, an Augustinian monk, sparked a religious revolution in the 16th century that would forever alter the landscape of Christianity and Western civilization. His audacious challenge to the authority of the Catholic Church, driven by his belief in salvation through faith alone and his famous Ninety-Five Theses, ignited a firestorm of debate and unrest across Europe. Luther's teachings, fueled by the newly invented printing press, spread like wildfire, reaching far beyond the confines of Wittenberg and igniting a movement that would eventually give birth to Protestantism. His revolutionary ideas transformed not only religious beliefs but also political and social structures, paving the way for a modern world shaped by individualism, freedom of conscience, and the separation of church and state.