Biotechnologies already on the horizon will enable us to be smarter, have better memories, be stronger and quicker, have more stamina, live longer, be more resistant to diseases, and enjoy richer emotional lives. To some of us, these prospects are heartening; to others, they are dreadful. In Beyond Humanity a leading philosopher offers a powerful and controversial exploration of urgent ethical issues concerning human enhancement. These raise enduring questions about what it is to be human, about individuality, about our relationship to nature, and about what sort of society we should...

This is the first attempt to provide an in-depth moral assessment of the heart of the modern human rights enterprise: the system of international legal human rights. It is international human rights law--not any philosophical theory of moral human rights or any "folk" conception of moral human rights--that serves as the lingua franca of modern human rights practice. Yet contemporary philosophers have had little to say about international legal human rights. They have tended to assume, rather than to argue, that international legal human rights, if morally justified, must mirror or at least...