Mann and Joyce are very different, and yet their fiction often appeals to the same people: Harry Levin taught a famous course on Joyce, Proust, and Mann, and Joseph Campbell singled out Joyce and Mann as special favorites. To see them as offering "possibilities for living", as I do, isn't to identify any distinctive commonality. After all, many great authors would fall under that rubric.
The truest definition of evil is that which represents it as something contrary to nature; evil is evil because it is unnatural; a vine which should bear olive-berries, an eye to which blue seems yellow, would be diseased; an unnatural mother, an unnatural son, an unnatural act, are the strongest terms of condemnation.