Ex injuria jus non oritur (Latin for "law (or right) does not arise from injustice") is a principle of international law.
[1] The phrase implies that "illegal acts do not create law".
[2] This principle was used to create the Stimson Doctrine.
The rival principle is ex factis jus oritur, in which the existence of facts creates law.
[3] This article related to international law is a stub.