A treatment of the fundamental ethical issues underlying the application of genetic technologies to humans.

1. Introduction; 2. Eugenics and its shadow; 3. Genes, justice, and human nature; 4. Positive and negative genetic interventions; 5. Reproductive freedom and the prevention of harm; 6. Why not the best?; 7. Genetic intervention and the morality of inclusion; 8. Policy implications; Appendix 1. The meaning of genetic causation, by Elliott Sober; Appendix 2. Methodology; References.