Justice at the Margins of War fills two important gaps in the literature on the ethics of national security affairs. First, while thinking about the justice of warfare is highly developed, justifications of intelligence activities—which can involve lying, manipulation, coercion, stealing and even killing to obtain and defend information—are relatively limited and often conflicting. The authors explore relevant ethical principles and then apply them to specific activities—including agent recruitment, human and technical methods of espionage and counterintelligence, interrogational...