Thoroughly researched and faithfully translated, the Luther's Works series consists of Martin Luther's Bible commentaries, sermons, prefaces, postils, disputations, and letters, translated and published in English for the first time. This volume presents most of Luther's activity as writer of theses and presider at academic disputations from December 1537 to his last disputation in July 1545, beginning with the First Disputation against the Antinomians, held on December 18, 1537. The disputations offer Luther's extended systematic exploratoin of the central doctines of Christian theology, drawn from his mature reflection on the Bible, the medieval theological tradition, and the church fathers, in dialogue and debate with his contemporary opponents. They are an invaluable resource for students of Luther, historians of the Reformation, and contemporary theologians.