International law is the law among and between nations, such as treaties. In contrast, Foreign law involves the law of jurisdictions outside of the United States, such as the law of France or Brazil. Comparative law studies the differences and similarities of the laws and legal traditions of different countries. The acronym FCIL is sometimes used to to refer to foreign, comparative and international law collectively.
There are two sides of international law: public and private. Public international law involves the law regulating the relations of states; it is often simply called "international law." Private international law involves the law regulating the behavior of individuals crossing national boundaries. There is another guide which specifically deals with the resources for private international law (linked under the FCIL Guides tab).
The International Law Guide provides a starting point for your research of international law. The guide provides sources for researching specific International Law subject areas as well as the basic sources of international law. The Statute of the International Court of Justice sets out the four sources of international law considered by the ICJ in Art. 38:
Mr. Anthony D’Amato
Judd and Mary Morris Leighton Professor of Law
Northwestern University School of Law
Mr. Christian Tomuschat
Humboldt University of Berlin
Ms. Ellen Hey
Professor of Public International Law
Erasmus School of Law
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