Just came across an essay by the ethics powerhouse Peter Singer. To read his work is to sign up for some serious soul-searching. This gem packs in ethics, evolutionary psychology, determinism, gene-hacking and (thus) transhumanism.
Marx once wrote: "The philosophers have only interpreted the world in various ways; the point is, to change it." He was not thinking of genetic change, but his comment will soon apply to that area, too. Within the present century, we are likely to learn how to change the genes of future generations to make human nature flow in the direction we want it to flow. That knowledge will bring an awesome responsibility, a responsibility that some think should never be exercised: the responsibility of deciding to improve human nature.