It is hoped that this book may serve as an outline for a larger work, in which the Judgments here expressed may be supported in detail. Especially, the author desires to treat the literature of the social question and of the modernist movement with a fulness which has not been possible within the limits of this sketch. The philosophy of religion and the history of religions should have place, as also that estimate of the essence of Christianity which is suggested by the contact of Christianity with the living religions of the Orient.