War is the most horrific thing humanity can experience, as proved by the fact that when a war ends the tragedies do not end. The effects of war go on for countless years and generations, because its allow for the commission of every kind of crime. The words of French thinker Gaston Bouthoul apply, “War is not a tool for us, rather we are a tool for it.” Assuming that war is a human phenomenon deeply rooted in human history, one must also recognize that the hope for peace is also deeply rooted in human nature. To this end, the world knows wars as much as it has known efforts to defuse war and put it on a legal footing. Following the steps regarding the prohibition or legal framing of war enables the understanding of the contributions of all eras, with their civilizations and religions in creating the human legal tradition.