Cryonics. Neural implants. Designer babies. Welcome to the future of transhumanism. This energetic movement, comprising thousands of adherents, actively promotes the enhancement of humans via cybernetics, genetics, medicine, surgery, nanotechnology, and a full panoply of other scientific advancements. This enhancement would, according to Nick Bostrom's "Transhumanist Declaration," seek to advocate "the moral right for those who wish to do so to extend their mental and physical (including reproductive) capacities and to improve their control over their own lives. [They] seek personal growth beyond [their] current biological limitations" (see www.transhumanism.org).  This may sound like science fiction, but the...