The state makes law. But the state is also subject to law in two realms: international law and constitutional law. But how in the international realm can law be enforced against powerful states in the absence of a super-state standing above them? How far can moral and legal frameworks developed around ordinary persons be extended to apply to personified Leviathans? The book argues that these kinds of questions are equally applicable to the second major regime of law for states, constitutional law. By assimilating constitutional and international law as parallel projects of imposing law upon the state, this book brings focus to the concept of "law for Leviathan" as a distinctive legal form.