Although it is possible, I’ve sometimes thought, that the ‘psychopath’ is such a product of modernity (which isn’t to say exclusively a product of modernity, but mainly so) as well as such an amalgam of types of sin, that Dante might not have found, among his contemporaries or the ancients, an individual that would fit such a description, had the terminology even been in use, as part of his lexicon. And so the very notion of a ‘psychopath’ might never have occurred to him. And so he did not include one of them in his infernal landscape.