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Making Sense Of Customary International Law, Monica Hakimi

Michigan Law Review

This Article addresses a longstanding puzzle about customary international law (CIL): How can it be, at once, so central to the practice of international law—routinely invoked and applied in a broad range of settings—and the source of such persistent confusion and derision? The centrality of CIL suggests that, for the many people who use it, it is not only comprehensible but worthwhile. They presumably use it for a reason. But then, what accounts for all the muddle and disdain?

The Article argues that the problem lies less in the everyday operation of CIL than in the conceptual baggage that is …