Philosophy of biology -- a systematic refutation of the arguments of people (such as Francis Fukuyama, Michael Sandel, and Leon Kass) who say that technologically modifying human beings is flat-out unethical. For people like me (but not necessarily Buchanan) who favor out-and-out transhumanism for some future time, one reaction to the refutations has to be, "Yes, yes, of course -- why grant the misguided naysayers so much attention?"