“People have gut feelings that give them emphatic moral convictions, and they struggle to rationalize the convictions after the fact. These convictions may have little to do with moral judgments that one could justify to others in terms of their effects on happiness or suffering. They arise instead from the neurobiological and evolutionary design of the organs we call moral emotions.”

— Steven Pinker, The Blank Slate: The Modern Denial of Human Nature (2002), Chapter 15: The Sanctimonious Animal, p. 271