This book investigates the complex and often contentious relationship between military necessity and the protection of civil rights in the United States. It examines historical instances where wartime powers have been invoked, leading to the curtailment or redefinition of civil liberties, and analyzes the legal and ethical frameworks that have governed these situations. The work explores the tension between national security imperatives and the fundamental rights of citizens, particularly during periods of conflict.

Mary Frances Berry's work on military necessity and civil rights policy is recognized for its scholarly depth and critical examination of historical precedents. The book is noted for its thorough analysis of how wartime powers have historically intersected with and often challenged the established framework of civil liberties in the United States. It provides a crucial historical perspective on the ongoing debate surrounding national security versus individual freedoms, making it a significant contribution to the fields of legal history and civil rights studies. The research offers valuable insights into the legal and ethical considerations that arise during times of national crisis.