Dietrich Bonhoeffer was one of the most significant Protestant theologians of the twentieth century, a legacy sealed by his imprisonment in a German concentration camp and eventual execution. His resistance against Nazism and pivotal role in the Confessing Church movement have been key points of illumination for many on the nature of Christian political witness and action. Millions have been inspired by his rich reflections on the Christian life, especially his beloved works on discipleship and ethics. As a professor, seminary leader, and ecumenical theologian, Bonhoeffer's work also profoundly shaped academic theology, especially systematic theology, and the life of the church. Craig L. Nessan is William D. Streng Professor for the Education and Renewal of the Church, academic dean, and professor of contextual theology and ethics at Wartburg Theological Seminary in Dubuque, Iowa, and serves as coeditor of the online journal Currents in Theology and Mission. He is the author of several books, including, Shalom Church: The Body of Christ as Ministering Community and Beyond Maintenance to Mission: A Theology of the Congregation. Renate Wind lives in Heidelberg and is Professor of Biblical Theology and Church History at the Evangelische Hochschule Nurnberg. She has been engaged for many years in the peace movement and is author of Dietrich Bonhoeffer: A Spoke in the Wheel (1991).