In Religion as an Agent of Change leading historians and Church historians discuss religion as a driving historical force on the basis of three particular cases from the history of Christianity in Western Europe: the Crusades, the Reformation, and Pietism.

Per Ingesman, Ph.D. (1985), is Professor of Church History at Aarhus University in Denmark. He specializes in and has published many monographs and anthologies on late medieval and early modern history and Church history.