Because technological development moves so quickly, it often outpaces changes in law and ethical norms that might be deemed necessary later. Sometimes, in the interim, people get hurt. At other times, preventive regulations may be overreactions, unnecessary to prevent harms and ultimately a drag on science and innovation. Eventually, it seems, some balance is achieved, and a nascent scientific field or technology is allowed to progress mostly according to market forces. Our technologies are certainly changing us and our planet. Largely, they have expanded our life spans and improved our well-...