William C. Placher was Charles D. and Elizabeth S. LaFollette Distinguished Professor in the Humanities and Chair of the Department of Philosophy and Religion at Wabash College in Crawfordsville, Indiana. He is the author or editor of a number of books, including A History of Christian Theology, Second Edition, Essentials of Christian Theology, and Jesus the Savior, all published by Westminster John Knox Press.
Derek R. Nelson is Associate Professor of Religion at Wabash College in Crawfordsville, Indiana. He is the author of Sin: A Guide for the Perplexed and What's Wrong with Sin and coauthor of A History of Christian Theology, Second Edition, published by Westminster John Knox Press.