This paper shows ways to develop, integrate, and transform Kant’s and Arendt’s theories on political evil into a unified Karendtian theory. Given the deep influence Kant had on Arendt’s thinking, the deep philosophical compatibility between their projects is not surprising. But the results of drawing on the resources left by both is exciting and groundbreaking with regard to both political evil in general and the challenges of modernity and totalitarianism in particular.