Is evil a “pathology“?
No “professional” opinion, as I’m not a professional in this (or any) area.
My belief happens to be that (apart from the inevitable, but small, quota of genetic psychopaths) what we call “evil” is a consequence of learning and culture rather than genes or “pathogens.”
Is learned cruelty a “disease”? Perhaps the way gambling and alcoholism are, in the sense that they can sometimes be unlearned (“cured,” or at least pushed into remission) by “therapy” (and some are born with more of a propensity towards it than others).
But calling such learned behaviors a “disease” is just playing with words. If the effects of air pollution are a disease, what is it when the pollutant is cultural (“cognitive”)?
Or maybe the question should be whether nationalism, religious zealotry, xenophobia, machismo and other malign “memes” are “pathogens”? That’s probably literally true in some sense, yet still remains more metaphorical than medical (just as a lot else that passes for psychology does). “Prevention” and “cure” depend on education and culture, not medicine. The right analogy there is not the effects of air pollution (or poverty, or injustice), but its causes: “pathogenogens”?
Unless someone finds a drug or surgery…