Since this is the last lecture in the series about The Seven Deadly Sins, it might be a good idea to stand back and think for a moment about the point of such a list. That seven is a good, mystical number obviously makes us suspicious about any claim (if one was ever made) that the list of the deadly sins was arrived at by the exercise of pure reason. It is not difficult to add to them. Why is cruelty not a specific deadly sin? Cruelty does not obviously come under wrath, nor, for that matter, under pride, envy or lust. Aquinas lists cruelty (ferocitas) as a sin against temperance. He distinguishes it from ferocity and savagery (saevitia and feritas), which are ‘bestial’ vices. Cruelty, for Aquinas, is the vice of excessive severity in punishment. Its opposing virtue is clemency—the rational tempering of punishment—which Aquinas considers to be part of temperance. These are fairly persuasive distinctions. Yet Aquinas’s idea of cruelty seems to have little if anything to do with the sort of cruelty that has most caught the attention of the modern world, which was touched on by Nietzsche—the deliberate infliction of pain upon another for pleasure. This was philosophised upon even more interestingly by Jean-Paul Sartre as being part of a project to reduce the Other to objecthood, revealing and at the same time cancelling his freedom. That would seem a good candidate for an additional deadly sin.
Perhaps, though, we should think about the deadly sins as a sort of mirror image of the virtues—as these appear, for instance, in Aristotle.