But surely, Ruth, to take your three donnés; social, psychological, brain chemistry — you present them as if they were full equivalents: BUT, I would urge, no such thing.

The social is, as it were externally induced; but the other two, internally — so to describe them as 'original' doesn't seem to me an unreasonable distortion of the term[s]. The fact that their causes may be, in your word, 'determinate' does not make them any the less - to find a cognate but perhaps less loaded word - intrinsic. & if they lead in their turn to any particularly antisocial manifestations, then 'evil' seems a perfectly reasonable adjective to use of their effects — it doesn't of itself, surely, imply or presuppose any necessary metaphysical or spiritual or faith-based component? It is, in not merely the grammatical sense, a simple qualitative adjective [or abstract noun, depending on its syntactical function within its context].