At the beginning of the book Grotius wrote: What reasons for war can be called just?
Grindelwald's example was preventing Muggles from destroying the world, while Grotius cited Virgil's Aeneid. The war between Aeneas and Turnus had been sparked by the injury of a stag.
If James Potter had attacked Snape merely to deal with a romantic rival, so many people would not have stood by and let him do whatever he pleased, with only Lily stepping forward to stop that "joke."
Even Alexander the Great could not say something like, "Because we are going to wage war, the peace treaty is invalid."
The reason for war was like a house's foundation, a ship's keel, and its other vital parts. It had to be built as solidly as possible and conform to justice and truth.
Only when justice was on our side could the strength of the army guarantee hope of victory. Otherwise, even if we achieved the desired initial results, we could not guarantee final victory.
Putting the sword of justice into the hands of an angry man would only bring terrible consequences. Saint Augustine wrote in City of God: if a state abandoned justice, what was it but a great band of robbers?
The gang formed by Sirius, James, Remus, and Wormtail was called the Marauders. Of course, they had not originally chosen that name because they intended to become robbers, but because they roamed about with a dangerous Werewolf.
Alexander the Great's birthplace lay in the northwestern corner of Asia Minor, not far from Troy. It and nearby Ataronaus were both under the rule of the king of Belumenia. In his era, the Greco-Persian Wars had already ended, as had the Peloponnesian War between the alliance of Athens and Sparta. Yet the world had not become peaceful