Arendt on Tyranny

The inner contradiction between the nation's body politic and conquest as a political device has been obvious since the failure of the Napoleonic dream. It is due to this experience and not to humanitarian considerations that conquest has since been officially condemned and has played a minor role in the adjustment of borderline conflicts. The Napoleonic failure to unite Europe under the French flag was a clear indication that conquest by a nation led either to the full awakening of the conquered people's national consciousness and to consequent rebellion against the conqueror, or to tyranny. And though tyranny, because it needs no consent, may successfully rule over foreign peoples, it can stay in power only if it destroys first of all the national institutions of its own people.

—Hannah Arendt, The Origins of Totalitarianism pt II, ch 5 (1951)