This work investigates the complex transformation of religious belief and practice among the populations of Western Europe during the period of rapid modernization between 1789 and 1970.

Hugh McLeod, a prominent historian of religion, utilizes a comparative framework to analyze how industrialization, urbanization, and political shifts influenced the secularization of European society. He examines the tension between institutional church authority and the evolving personal spiritual lives of the working and middle classes. The text synthesizes vast archival data to argue that religious decline was not a uniform process but a varied experience shaped by local cultural contexts.

Historians and scholars of religion frequently cite this work as a foundational text for understanding the secularization thesis in a European context. Readers often note the academic density of the prose, which provides a rigorous and comprehensive overview of the social history of religion.