Karl Barth (1886-1968) was Professor of Theology at the University of Basel, Switzerland. One of the greatest theologians and preachers of the twentieth century, he is best known for his monumental systematic theology, Church Dogmatics. Eberhard Busch is professor emeritus of Reformed theology at the University of Göttingen, Germany. A one-time student of and personal assistant to Karl Barth, he is also the son of one of the Barmen Declaration's original signers. Karlfried Froehlich is Princeton Theological Seminary's Benjamin B. Warfield Emeritus Professor of Ecclesiastical History and serves as German editor for Barth in Conversation. His special interest is the history of biblical interpretation, especially in the Middle Ages, Christian iconography, and ecumenism. Darrell L. Guder is Princeton Theological Seminary's Henry Winters Luce Emeritus Professor of Missional and Ecumenical Theology and serves as English editor for Barth in Conversation. His writing and teaching focus on the theology of the missional church, especially the theological implications of the paradigm shift to post-Christendom as the context for Christian mission in the West. David C. Chao is a PhD candidate in theology at Princeton Theological Seminary and serves as Project Editor for Barth in Conversation. His research interests include Protestant and Catholic dogmatics (especially as they pertain to issues of nature and grace), Reformed theology (classical and modern), and Asian American theology.