Tomorrow has never looked better. Breakthroughs in fields like genetic engineering and nanotechnology promise to give us unprecedented power to redesign our bodies and our world. Futurists and activists tell us that we are drawing ever closer to a day when we will be as smart as computers, will be able to link our minds telepathically, and will live for centuries—or maybe forever. The perfection of a “post-human” future awaits us.Or so the story goes. In reality, the...
