This work investigates the historical origins and cultural development of American fundamentalism during the critical transition period between 1870 and 1925. George M. Marsden, a prominent historian of American religion, utilizes extensive archival research and theological analysis to argue that fundamentalism was not merely a reactionary movement but a complex, coherent intellectual tradition. He examines how evangelical Protestants navigated the challenges of modernity, science, and shifting social norms to reshape their identity within the broader American landscape.

Historians and scholars of American religion widely regard this text as the definitive account of the fundamentalist movement's early development. Readers frequently note the academic rigor and balanced perspective Marsden maintains while navigating highly contentious theological and social history.