Do international institutions promote cooperation? If so, how? These questions are of fundamental importance in the study of international relations. They are also the focus of Jim Morrow's Order within Anarchy: The Laws of War as an International Institution. Offering novel and persuasive answers to these core questions, Order within Anarchy belongs on every field seminar syllabus. It is no easy read—both due to its length and the dense nature of the material, even considering the fact that Morrow wisely relegates most of the technical material to separate chapters—but those who devote the time and effort to digesting it will be amply rewarded.