His ideas, later elaborated by St Thomas Aquinas (1226–74), Francisco de Vitoria (1480–1546) and others, formed the background to the work of Grotius, who made an important contribution with his emphasis on the idea of temperamenta belli, i.e. moderation in the conduct of war.
The ideas of prominent thinkers like St Thomas Aquinas (1226–74), Francisco de Vitoria (1480–1546), and others served as a foundation for Grotius' contributions, particularly his emphasis on the concept of tempered warfare, or moderation in conflict.