This series is the first modern edition of the main body of Mercersburg theology. It includes all the important works, large and small, of John W. Nevin, Philip Schaff, and lesser Mercersburg figures, covering the significant doctrines and issues of the movement. Each volume includes critical or explanatory notes, relevant introductions, and bibliographies of modern works. With few exceptions, the early texts are reproduced in unabridged form. Since the original Mercersburg materials are now extremely scarce, and almost impossible to assemble in their entirety, the Lancaster Series forms an invaluable resource for historians of American Christianity and, in particular, for serious students of theology. It will commend itself to all those who wish to understand the nineteenth-century background of contemporary Protestantism. Both of the Mercersburg theologians, Schaff and Nevin, looked forward to a new age of the church - an age which would call into unity and catholicity all the divisions of the body of Christ.