This book investigates the historical roots and contemporary political influence of white Christian nationalism as a significant threat to the stability of American democratic institutions. Philip S. Gorski and Samuel L. Perry, both established sociologists, utilize a combination of historical analysis and empirical data to argue that white Christian nationalism is not merely a religious movement but a political ideology that seeks to redefine American identity through a racialized and exclusionary lens. They trace the development of this ideology from its colonial origins to its modern manifestation in political discourse, providing a framework for understanding how it shapes public policy and social polarization.

Experts and political commentators frequently cite this work as a foundational text for understanding the intersection of religion and right-wing populism in modern America. Readers often note the clarity of the authors' sociological arguments and the depth of their historical research into the origins of nationalist sentiment.