This book explores John Webster's contribution to one of the most important and contested topics in Christian theology: the relationship between divine and human agency. By examining the theme of moral ontology in Webster's constructive dogmatics, this work sheds light on his contribution to this crucial subject. Jones achieves this through close study of Webster texts ranging from his early, middle and late periods. He reveals that Webster's moral ontology is not only a major theme in his thought but is among his most significant contributions to contemporary systematic and moral theology. As the first book-length study of a central theme in Webster's ethics, this text will be of interest to Webster scholars and those teaching courses in late modern systematic theology and theological ethics.