Aristotle says little about moral badness [kakia], but his four central claims about it su????ce to entail a rich and plausible account. Badness is the disposition opposed to virtue, and so symmetrical with it in various ways; it is acquired by habituation; it is unlike akrasia in that the bad person’s reason endorses his wrong actions; and this endorsement involves the exercise of a corrupted reason. The activity of corrupted reason must be a kind of (as we now say) motivated (...) reasoning—rationalization, denial and the like—which serves to conceal the correct ends of action from the corrupt person and to sustain their habitual bad behaviour. Although badness is located in the non-rational soul, it is this corruption of reason which turns it into a stable disposition. (shrink)