Is this a just war? The word seems to make people edgy. And the time of reasonable debate (without risk of attracting the thunder of sovereignist neopacifism) on this very old concept of political philosophy one would have thought had proven its theoretical validity, from the Dominican Francisco de Vitoria to the American Michael Walzer, is in the past. Then, let’s say inevitable war. Let’s say that, confronted with a rabid tyrant, when a people’s right to self-determination becomes the right of the tyrant to determine their fate, when he, the tyrant, claims the double principle of sovereignty (a man’s home is his castle; what happens within my borders is my affair and mine alone) and of equality of States before the law (a crazy putschist, a professional criminal, is equal to a democrat, therefore nothing and no one has the right to curb his bloodthirsty impulses), moral law dictates, yes, that one must intervene to stop