Universal jurisdiction is a legal principle that allows states or international organizations to claim criminal jurisdiction over an accused person regardless of where the alleged crime was committed, and regardless of the accused's nationality, country of residence, or any other relation to the prosecuting entity. Crimes prosecuted under universal jurisdiction are considered crimes against all, too serious to tolerate jurisdictional arbitrage. The concept of universal jurisdiction is therefore closely linked to the idea that some international norms are erga omnes, or owed to the entire world community, as well as to the concept of jus cogens – that certain international law obligations are binding on all states.

Crimes against humanity are certain serious crimes committed as part of a large-scale attack against civilians. Unlike war crimes, crimes against humanity can be committed during both peace and war and against a state's own nationals as well as foreign nationals. Together with war crimes, genocide, and the crime of aggression, crimes against humanity are one of the core crimes of international criminal law, and like other crimes against international law have no temporal or jurisdictional limitations on prosecution.