<P>Radical enhancement would employ technology to extend human capacities far beyond anything yet seen or experienced. Imagine, for example, <I>easily</I> outrunning any Olympic athlete while being <I>dramatically</I> smarter than Albert Einstein. Or imagine living for hundreds or thousands of years, making today’s super-centenarians seem like mayflies. Soon – perhaps some time this century – we may have the technology for this. But if we had it, should we use it? Radical enhancement might seem like a gift, but could it become, as its critics warn, a poisoned chalice for individuals and a curse for human societies? In this fascinating book, Russell Blackford examines the pros and cons, bringing good humour, philosophical insight, and historical perspective to this most modern of modern debates.</P>