Just war: Quick Facts

Written and fact-checked by

The Information Architects of Encyclopaedia Britannica

Photos

Philippe de Champaigne: Saint Augustine

St. Thomas Aquinas

Oil portrait of Hugo de Groot, also known as Hugo Grotius, by the workshop of Michiel Janszoon van Mierevelt, showing him with a ruffled white collar and dark clothing.

See All Images →

Topics

Casus belli Law of war war guerrilla warfare Ethnic conflict special operations warfare cyberwar War crime civil war Prisoner of war trench warfare asymmetrical warfare proxy war

Key People

Vitoria, Francisco de

Francisco de Vitoria

Spanish theologian