Book excerpt: Many factors contributed to the Protestant Reformation, but one of the most significant was the debate over the doctrine of justification by faith alone. In fact, Martin Luther argued that justification is the doctrine on which the church stands or falls. This comprehensive volume of 26 essays from a host of scholars explores the doctrine of justification from the lenses of history, the Bible, theology, and pastoral practice—revealing the enduring significance of this pillar of Protestant theology.