"This book is unique: a survey of early Christian apologetic writing that covers all major figures in the period! Williams's insightful and always reliable erudition is a joy to read and will benefit generations of scholars and students seeking to understand this constant theme in early Christian writing. Theologians, Classicists, and Historians will all find this book an immense boon." --Lewis Ayres, Professor of Catholic and Historical Theology, Durham University and Australian Catholic University "This volume does not confine itself to texts of a particular type and period. It gives a full account of neglected but important works that followed the 'triumph' of Christianity, exploring the historical situations that at times might prompt the choice of historiography or political agitation as means of catching the reluctant pagan ear. Each chapter also providesÂan insightful and comprehensive guide to current debates in scholarship." --Mark Edwards, Professor of Early Christian Studies, University of Oxford "In this sweeping exploration of early Christian apologetics--indeed magisterial in its breadth--D.H. Williams expands our sense of Christianity's engagement with the larger non-Christian culture well beyond the traditional study of apologetics, which focuses on the pre-Constantinian era. In this way also he challenges contemporary theologians to rethink the place of apologetics beyond the Barthian critique of Schleiermacher and von Harnack's fears of cultural syncretism." --J. Warren Smith, Professor of Historical Theology, Duke Divinity School "The writings by early Christian authors that were purportedly addressed to outsiders present a notoriously diverse body of literature, provoking a wide range of general and of specific questions regarding how they are to be understood within their historical contexts. In its range and clarity Defending and Defining the Faith fills a serious gap as it guides its readers through the debates and through the writings themselves, and makes its own contribution to locating them within wider discussion of the formation of a Christian identity." --Judith Lieu, author of Marcion and the Making of a Heretic: God and Scripture in the Second Century