- The Christian Faith: Based on Lectures Delivered at the University of Heidelberg in 1912 and 1913 (Fortress Texts in Modern Theology)
- Protestantism and Progress: A Historical Study of the Relation of Protestantism to the Modern World
- The absoluteness of Christianity and the history of religions; (The Library of philosophy and theology)
- THE SOCIAL TEACHINGS OF THE CHRISTIAN CHURCHES. Volume I (One, 1).
- Religion in History





























