Francis Fukuyama calls at the September 2004 edition of Foreign Policy Transhumanism one of the "most dangerous ideas in the world". Fukuyama criticizes transhumanists that they're, through biotechnology, trying to create a Nietzschean superhuman far exceeding those qualities created by natural evolution. Here Nick Bostrom of transhumanists answers to Fukuyama.
I think transhumanists are typical utopia builders living in their high spheres but not exactly having a touchpoint with actual every-day reality. If we become physical and mental superhumans, will that also solve the economical and environmental problems of our current culture; not to speak about wars, terrorism and so on?