I believe in human turpitude and the depths of depravity we will descend to to appease our sadistic desires; I work with decomposing human cadavers who're the victims of heinous crimes, I've seen most indignities and even the vestiges of consternation and terror still discernable on their faces as they've died.

I don't believe anyone is predisposed towards evil, it's quite a nebulous term with a thousand different definition spanning cultures and individual perception of morality.

I've encountered unrepentance expressed in a variety of ways from defiance to true unadulterated malice. If malevolence constitutes true evilness, I've seen it and it's mundane in appearance.