Can you turn to God by your own free will? Are you able to earn your salvation by partnering with His grace? To these questions, Erasmus of Rotterdam gave an emphatic yes. He was one of the most influential scholars in the sixteenth century, so his word carried great weight. Yet Erasmus did not go unanswered. Seeing that the gospel itself was at stake, Martin Luther wrote a thunderous response that has remained influential even half a millennium later. This five-hundredth-anniversary edition of The Bondage of the Will recaptures the urgency of Luther's appeal to Scripture. It was this defense of our absolute need for God to deliver us from our captivity to sin that Luther considered his most important book. Take up this Reformation classic and rejoice in the freedom found in sovereign grace alone.