Each volume in this series introduces the reader to the life and work of a major figure in contemporary theology. It furnishes a key to his thought, presents the most im-portant challenges to his ideas, and offers some clues to the future. The stature of each thinker implies a theologi-cal vision that may not yet have had its major influence.

The Promise of Theology series is edited by Martin E. Marty, Professor of Modern Church History, The Divinity School, University of Chicago.