A Kantian Theory of Evil

Is there any interesting sense in which we can speak of an act as ‘evil’, in contrast to simply “morally bad’ or “immoral”? In ordinary language, we typically judge actions as evil that somehow differ significantly, in terms of degree or intensity, from commonplace wrongdoing. That is, what we regard as evil are just those actions that, to some greater extent, more seriously offend our deeply-held moral sentiments or that produce much more harmful consequences. We feel that brutal acts of murder, rape, torture, and mass genocide somehow go beyond immorality. We want to call them “evil”.