Medicine has recently discovered spectacular tools for human enhancement. Yet to date, it has failed to use them well, in part because of ethical objections. Meanwhile, covert attempts flourish to enhance with steroids, mind-enhancing drugs, and cosmetic surgery--all largely unstudied scientifically. The little success to date has been sporadic and financed privately. In How to Build a Better Human, prominent bioethicist Gregory E. Pence argues that...