This Book is an important study of Barth's theology of human action, arguing that Barth's work cannot be properly understood unless his interest in human agency is fully appreciated. Throughout, Professor John Webster demonstrates the contemporary vitality of the style and content of Barth's theology. Many of the studies introduce posthumous texts by Barth which have so far received little attention (such as his lectures on Calvin and his ethics lectures), but which substantially revise the received views of Barth's thinking about ethics and human action. Developing from the author's earlier study of Barth's Ethics of Reconciliation (CUP, 1995), this book argues forcefully for Barth's work as a whole to be understood as moral theology.