This chapter observes that early writers on the law of war or on the law of peace offered their contributions in an intellectual context that was very different from our own. They were attempting to provide explanations for the questions related to war and peace, and in doing so drew upon interesting elements in Roman or canon law. Yet, none of the sources available to them were sufficient to offer a comprehensive response to related legal issues. Although these authors were all largely relying on the Bible and on ancient or contemporaneous history, some also drew information from their own life experiences. The majority, however, built their theories on the basis of their own readings and legal knowledge. Furthermore, only very few authors addressed the question of the sources of international law.
Natural Law and War – Focusing on the Law of War and Peace by Hugo Grotius