Now with additional material on developments in late-twentieth-century and Orthodox theology. "History of Theology" presents how different groups and various individuals have interpreted the original Christian rule of faith, which summarizes the content of Scripture. As you master how this fixed confession of the given truths of the Christian faith has developed in form, your faith in the triune God will deepen and strengthen. This book traces the movements and counter-movements of theological thought through the centuries from the New Testament to the present. This work is divided in three parts. Part 1 addresses the age of the church fathers. Part 2 covers the Middle Ages from Augustine to Luther. Part 3 moves from the Reformation thru the 20th century.