Brutes or angels: human possibility in the age of biotechnology

Cells and molecules: the unity of life

Stem cells : embryos, therapeutic cloning, and personhood

Embryo selection : preimplantation genetic diagnosis

The human genome project : spin-offs and fallout

Human diversity, genes, and medicine : richness and dangers

Genetic enhancement : humankind healing and redesigning itself

Human reproductive cloning : sameness, uniqueness, and personal identity

Age retardation : chasing immortality for better or worse

The mind : neuroenhancement and neuroethics

Synthetic biology : from cocreator to creator.