The book examines the life and impact of Abbé Grégoire, a pivotal figure in the French Revolution and its aftermath. Jeremy D. Popkin, a distinguished historian, utilizes extensive archival research and primary source materials to reconstruct Grégoire's complex legacy. The work explores his roles as a clergyman, a revolutionary politician, and an advocate for the rights of marginalized groups, particularly Jews and Black people. It situates Grégoire's actions and ideas within the tumultuous socio-political landscape of late 18th and early 19th century France.

Jeremy D. Popkin's work on Abbé Grégoire is recognized for its scholarly depth and comprehensive research. It is considered a significant contribution to the understanding of the French Revolution and its intellectual currents. The book is noted for its detailed exploration of Grégoire's multifaceted career and his progressive stances on issues of equality and human rights. This biography offers a thorough examination of a key figure whose ideas and actions continue to resonate.