4th century BCE In the Republic and Laws, Plato stresses the importance of justice in an ideal state.
1st century BCE Cicero opposes the overthrow of the Roman Republic and its replacement with an emperor.
306 CE Constantine I becomes the first Christian emperor of the Roman empire.
13th century Thomas Aquinas uses Augustine’s arguments to define a just war.
14th century Ibn Khaldun says that government’s role is to prevent injustice.
c.1600 Francisco Suárez and the School of Salamanca create a philosophy of natural law.
In 380 CE, Christianity was effectively adopted as the official religion ...