This book investigates the ideological origins and political evolution of the regionalist movement in France between 1890 and 1914. Julian Wright, a historian specializing in modern French intellectual history, utilizes the life and writings of Jean Charles-Brun to challenge the conventional view that regionalism was exclusively a right-wing phenomenon. By examining Charles-Brun's extensive network of contacts and his journalistic output, Wright constructs a nuanced argument that regionalism functioned as a flexible, cross-partisan political framework that influenced the development of modern French governance.

Historians and political scientists recognize this work as a significant contribution to the study of French intellectual history, particularly for its ability to clarify the complex political affiliations of the era. Scholars frequently note that the text provides a rigorous, well-documented examination of a previously misunderstood movement, making it a foundational resource for those studying the intersection of regionalism and national identity.