The first of four issues by Christian History on the Reformation explores the roots and fruits of reform. In 1517, a young Augustinian monk and theology professor, with one nail to the Wittenberg Castle door, struck a death blow to medieval Catholicism. That’s the story we think we know of Martin Luther. But is it the whole story? What cries for reform preceded Luther? Who helped him and who opposed him? What did he change and the what didn’t he? Find out in this issue.