International law under

In Islam, a similar framework was developed wherein the law of nations was derived, in part, from the principles and rules set forth in treaties with non-  Customary internationalThe Law of NationsVienna Convention on the Law

It was defined by Philip Jessup as "all law which regulates actions or events that transcend national frontiers". A more recent concept is supranational law,  Customary internationalThe Law of NationsVienna Convention on the Law