This book investigates the divergence in foreign and security policies between the United States and European nations within the Atlantic Alliance. Amy Verdun, a noted scholar in international relations, examines the historical evolution of these policy differences, drawing on extensive archival research and comparative analysis of governmental documents. The core argument posits that differing national interests, threat perceptions, and institutional structures have led to persistent, though not insurmountable, divides in transatlantic security cooperation.

This work is recognized for its detailed historical analysis and comparative approach to understanding transatlantic foreign and security policy. Scholars in international relations and political science have noted its contribution to the study of alliance dynamics and the persistent challenges in aligning diverse national interests within a multilateral framework. The book is considered a valuable resource for understanding the complexities of NATO's internal policy debates and the factors shaping its strategic direction.