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 map how evangelical movements evolved into a distinct fundamentalist identity. He argues that this shift was not merely a reaction to modernity but a complex synthesis of traditional piety and new cultural anxieties. The book provides a framework for understanding the intellectual and social pressures that shaped the twentieth-century religious landscape.

Scholars and historians widely regard this text as a foundational study for understanding the roots of modern American religious conservatism. Readers frequently note the academic density of the prose and the author's meticulous attention to historical detail.