Law Commons^™

Inefficient Customs In International Law, Eugene Kontorovich

William & Mary Law Review

This Article explores whether and when rules of customary international law (CIL) can be expected to be efficient. Customary rules are often regarded as desirable because in certain circumstances, they promote the welfare of the group in which they arise. Unless these circumstances apply among states, the efficiency arguments for the legalization of customary norms do not apply. The Article takes as its central observation the divergent treatment of custom in domestic and international law. In international law, if a customary behavior of states can be identified, it is automatically elevated to the status of legal obligation without any independent …