Order Within Anarchy focuses on how the laws of war create strategic expectations about how states and their soldiers will act during war, which can help produce restraint. International law as a political institution helps to create such expectations by specifying how violence should be limited and clarifying which actors should comply with those limits. The success of the laws of war depends on three related factors: compliance between warring states and between soldiers on the battlefield, and control of soldiers by their militaries. A statistical study of compliance of the laws of war...