On the Bondage of the Will (De Servo Arbitrio, literally, "On Un-free Will", or "Concerning Bound Choice") by Martin Luther argued that people can achieve salvation or redemption only through God, and could not choose between good and evil through their own willpower. It was published in December 1525. It was his reply to Desiderius Erasmus' De libero arbitrio diatribe sive collatio or On Free Will, which had appeared in September 1524 as Erasmus' first public attack on Luther. The debate between Erasmus and Luther is one of the earliest of the Reformation over the issue of free will and predestination, between synergism and monergism. De libero arbitrio diatribe sive collatio Despite his own criticisms of contemporary Roman Catholicism, Erasmus argued that it needed reformation from within and that Luther had gone too far. He held that all humans possessed free will and that the doctrine of predestination conflicted with the teachings of the Bible. Erasmus argued against the belief that God's foreknowledge of events caused those events, and he held that the doctrines of repentance, baptism, and conversion depended on the existence of free will. He likewise contended that divine grace called, led, and assisted humans in coming to the knowledge of God, and then supported them as they used their free will to make choices between good and evil, and enabled them to act on their choices for repentance and good, which in turn could lead to salvation through the atonement of Jesus Christ. Luther's response was to reason that original sin incapacitates human beings from working out their own salvation, and that they are completely incapable of bringing themselves to God. As such, there is no free will for humanity because any will they might have is overwhelmed by the influence of sin. Central to his analysis, both of the doctrines under discussion and of Erasmus' specific arguments, are Luther's beliefs concerning the power and complete sovereignty of God.