Declaring War directly challenges the 200-year-old belief that the Congress can and should declare war. By offering a detailed analysis of the declarations of 1812, 1898, and the War Powers Resolution of 1973, the book demonstrates the extent of the organizational and moral incapacity of the Congress to declare war. This book invokes Carl von Clausewitz's dictum that "war is policy" to explain why declarations of war are an integral part of war and proposes two possible remedies – a constitutional amendment or, alternatively, a significant reorganization of Congress. It offers a comprehensive historical, legal, constitutional, moral, and philosophical analysis of why Congress has failed to check an imperial presidency. The book draws on Roman history and international law to clarify the form, function, and language of declarations of war, and John Austin's speech act theory to investigate why and how a "public announcement" is essential for the social construction of both war and the rule of law.