1. Agar, N. (2004) Liberal Eugenics: In Defence of Human Enhancement (Maiden, MA: Blackwell).
2. Athanasiou, T. and Darnovsky, M. (2002) ‘The Genome as a Commons,’ World Watch, 15, 33–6.
3. Briggle, A. (2010) A Rich Bioethics: Public Policy, Biotechnology, and the Kass Council (Notre Dame, IN: University of Notre Dame Press).
4. Carrico, D. (2004) ‘The Trouble with Transhumanism: Part II’, available at: http://ieet.org /index.php/IEET/more/carrico20041222 (accessed 1 April 2014).
5. Clifford, W. K. (1877) The Ethics of Belief and Other Essays (Amherst, NY: Prometheus Books).