This book is among the few to develop in detail the proposition that international law on the subject of interstate force is better derived from practice than from treaties. Mark Weisburd assembles here a broad body of evidence to support practice-based rules of law on the subject of force. Analyses of a particular use of force by a state against another state generally begin with the language of the Charter of the United Nations. This approach is seriously flawed, argues Weisburd. States do...