The period of the Reformation touches the interests of most people in one way or another and consequently receives attention from historians with a great variety of interests, running the gamut from dialectic materialism to theology. Much of this concern stems from our preoccupation with the strong revival of religion subsequent to the first World War and evinced in neo-scholasticism, Barthian evangelicalism, neo-orthodoxy, the Luther renaissance, the ecumenical movement, and similar manifestations, on the one hand, and our great concern with the widespread social tensions and revolutions which are springing up in all parts of the world and are keeping us poised on the brink of another world war.