Biotechnologies already on the horizon will enable us to be smarter, have better memories, be stronger and quicker, live longer, be more resistant to diseases, and enjoy richer emotional lives. Allen Buchanan explores urgent ethical issues raised by these developments, about what it is to be human and what sort of society we should strive to have.

• 1: The Landscape of the Enhancement Debate


• 2: Enhancement and Human Development Enhancement and Human Development


• 3: Character


• 4: Human Nature and the Natural


• 5: Conservatism and Enhancement


• 6: Unintended Bad Consequences


• 7: Moral Status and Enhancement


• 8: Distributive Justice and the Diffusion of Innovations

Allen Buchanan is Professor of Philosophy at Duke University