Karl Barth is widely regarded as the most important theologian of the twentieth century, and his observations about the church and its place in a modern world continue to engage religious scholars nearly fifty years after his death. Eberhard Busch is professor emeritus of Reformed theology at the University of Göttingen, Germany and a former student of and personal assistant to Karl Barth. 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. Matthias Gockel is senior lecturer in Systematic Theology at the University of Basel and serves as German editor for Barth in Conversation. His research interests include the theology of Karl Barth and its reception, modern Protestant theology, the doctrine of God, and political ethics.