1267–72 Thomas Aquinas writes Summa Theologica, the most influential work of Christian theology in the West.
1492 Genoese explorer Christopher Columbus lands in the New World, leading to a race for conquest in the Old World.
1625 Drawing on de Vitoria’s teachings, Hugo Grotius publishes On the Law of War and Peace, a seminal work for the formulation of international law.
1899 The first Hague Conference takes place, resulting in the first formal convention on the laws of war and war crimes.
Francisco de Vitoria was central among the group of theologians at the University of Salamanca, Spain, who ...