Oh, tell me, who first declared, who first proclaimed that man only does nasty things because he does not know his own real interests; and that if he were enlightened, if his eyes were opened to his real normal interests, man would at once cease to do nasty things, would at once become good and noble because, being enlightened and understanding his real advantage, he would see his own advantage in the good and nothing else… . Oh, the babe! Oh, the pure, innocent child!
—Fyodor Dostoyevsky, Notes from the Underground
Caution: the link goes to a page of graphic nastiness, although it is well-spoilered in advance. Only someone in a persistant nuance trance could dream of giving these beasts any slack.