We theorists of international law like to pose venturesome, vitalizing questions, sweeping in scope: What would an ideal system of international criminal law look like, for instance, relieved of today’s geostrategic constraints? How might we lend some conceptual coherence to such a program, flesh out its normative details? What kind of world would be required for such a program to become possible, even intelligible? How should we imagine the workings of such a hypothetical world?