In 395 AD, Rome split into two empires - the Western Roman Empire and the Eastern Roman Empire. Each side had a ruler in charge of it. The Roman Empire was split by Theodosius.
The First Geneva Convention (1864) is one of the earliest formulations of international law. International law is the set of rules generally regarded and accepted as binding in relations between states and between nations. It serves as a framework for the practice of stable and organized international relations.
It waived the rules and habitual principles of classical international law and appealed to the criminal justice of States. To be consensual in scope and implementation, universal jurisdiction should take up the most serious international crimes, such as genocide, war crimes, and crimes against humanity.