In the mid-nineteenth century, Reformed churchmen John Nevin and Philip Schaff launched a fierce attack on the reigning subjectivist and rationalist Protestantism of their day, giving birth to what is known as the "Mercersburg Theology." Their attempt to recover a high doctrine of the sacraments and the visible Church, among other things, led them into bitter controversy with Charles Hodge of Princeton Seminary, as well as several other prominent contemporaries. This book examines the contours of the disagreement between Mercersburg and and Hodge, focusing on four loci in particular-Christology, ecclesiology, sacramentology, and church history. W. Bradford Littlejohn argues that, despite certain weaknesses in their theological method, the Mercersburg men offered a more robust and historically grounded paradigm for the Reformed faith than did Hodge. In the second part of the book, Littlejohn explores the value of the Mercersburg Theology as a bridgehead for ecumenical dialogue, uncovering parallels between Nevin's thought and prominent themes in Anglican, Catholic, and Orthodox theology, as well as recent debates within Reformed theology. This thorough study of one of the most creative movements in American theology offers an alluring vision of the question for Reformed catholicity that is more relevant today than ever. "Deeply sympathetic to the Mercersburg theologians, Nevin and Schaff, Littlejohn presents a plea for Reformed theology to take Church, sacraments, and apostolic succession seriously as divine means of salvation. By linking Mercersburg to the Oxford Movement, Eastern Orthodoxy, and the Catholic movement of nouvelle théologie, this book contributes toward a renewal of Reformed theology. Littlejohn's ressourcement of the Mercersburg Theology is courageous and stands as a model of solid ecumenical theology."—Hans Boersma, author of Violence, Hospitality, and the Cross and Nouvelle Théologie & Sacramental Ontology