Hugo Grotius (1583-1645), a.k.a., Hugo de Groot, laid the foundations for international law based on natural law with Francisco de Vitoria and Alberico Gentili. The 1625 De Jure Belli ac Pacis, also translated as On the Law of War and Peace, is considered to be a foundational work in international law. Это и многое другое вы найдете в книге The Rights of War and Peace