Has the concept of sovereignty outlived its usefulness? SSocial order requires a sovereign: an actor with unlimited, undivided, and unaccountable authority. Or so the classic theory says. But without noticing, we've gutted the theory. Constitutionalism limits state authority. Federalism divides it. The rule of law holds it accountable. In vivid historical detail--with millions tortured and slaughtered in Europe, a king put on trial...