This book examines the dependence of transhumanist arguments on the credibility of the narratives of meaning in which they are embedded. By taking the key ideas from transhumanist philosophy - the desirability of human self-design and immortality, the elimination of all suffering and the expansion of human autonomy - the author explores these narratives and the understanding of human nature that informs them. Particular attention is paid to the theory of transhumanism as a form of utopia, stories of human nature, the increasing integration of the radical human enhancement project into the cultural mainstream, and the drive to upgrade from flesh to machine.<\\P>