Aristotle/ Hume' moral theory

  Both Aristotle and Hume propose a moral theory that is based on a psychological theory -- a theory of all or some part of human nature. Discuss one of these philosophers' views on the source of morality (what we focus on when we judge something moral or immoral) and identify what account of human psychology or human nature is that philosopher committed to. Explain whether the philosopher's moral theory would still be true or plausible if their theory of human psychology or human nature was false.