Michigan Journal of International Law Volume 12 Issue 1 1990 Customary International Law: Its Nature, Sources and Status as Law of the United States Jordan J. Paust University of Houston Follow this and additional works at: https://repository.law.umich.edu/mjil Part of the International Law Commons Recommended Citation Jordan J. Paust, Customary International Law: Its Nature, Sources and Status as Law of the United States, 12 MICH. J. INT'L L. 59 (1990). Available at: https://repository.law.umich.edu/mjil/vol12/iss1/2 This Article is brought to you for free and open access by the Michigan Journal of International Law at University of Michigan Law School Scholarship Repository. It has been accepted for inclusion in Michigan Journal of International Law by an authorized editor of University of Michigan Law School Scholarship Repository. For more information, please contact
[email protected]. CUSTOMARY INTERNATIONAL LAW: ITS NATURE, SOURCES AND STATUS AS LAW OF THE UNITED STATES Jordan J. Paust* Customary international law is one of the primary components of law in the international legal process, a dynamic process profoundly interconnected with our own domestic legal processes for at least the last 250 years. In our history, customary international law has also been received as part of the "law of nations," a phrase used inter- changeably by our courts with the phrase "international law" from the dawn of the United States.' What, more particularly, has been the perceived nature of customary international law in the United States? Despite much theoretical discussion (usually without adequate atten- tion to actual trends in judicial decision), what have been recognizable sources or evidences of that law and its components? What constitu- tional bases exist for the incorporation of customary international law, and what sorts of status are possible? These and related questions are explored below.