Well, that's just the point. Why do we think that "pushing people down stairs" is "twisted"? Because we have a sense of "right" (or "compassionate", in this case), and "wrong" ("sociopathic", in this case). Where did that come from? My opinion/belief/theory is that "the universe" or "the creator" or whatever one would call it (I call it "God") gave us that sense of morality, just as we are also given free will. Jeff seems to believe in some form of ultimate creator, while Doug seems to dismiss that idea.