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| Preface and Acknowledgments | |
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| Genius Sperm, Eugenics, and Enhancement Technologies | |
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| Two kinds of eugenics | |
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| Technological possibilities | |
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| Moral perplexities | |
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| Hither posthumanity? | |
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| A Pragmatic Optimism about Enhancement Technologies | |
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| Will we be able to clone geniuses? | |
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| Human genomics and the search for smart genes | |
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| Doogie's downside | |
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| Nuclear powered vacuum-cleaners or nuclear bombs | |
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| A pragmatic optimism about enhancement technologies | |
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| Making moral images of biotechnology | |
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| Utilitarian and Kantian advice about enhancement | |
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| Moral images and moral consistency | |
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| Midgley's scepticism about consistency | |
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| Harvesting Stem cells: RESEARCH or THERAPY? | |
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| Are enhancement technologies wrong because they are 'yucky'? | |
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| Why food is different | |
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| Are enhancement technologies wrong because they will destroy meaning? | |
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| The moral image of therapy | |
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| The biotechnological solution to disease | |
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| Who benefits from gene therapy? | |
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| Are we essentially human beings or essentially persons, and does it matter? | |
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| Genetic influences, environmental influences, and the formation of human identities | |
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| Interactionism's implications for identity | |
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| The scope of THERAPY and the notion of disease | |
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| Buchanan, Brock, Daniels, and Wikler on protecting normal functioning | |
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| THERAPY, obligation, and procreative liberty's diminishment | |
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| The moral image of nature | |
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| Enhancement, NATURE, and Posthumanity | |
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| The biology of human nature | |
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| A moral parity of natural and engineered genetic arrangements | |
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| Pluralism about human flourishing | |
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| How to avoid infringing freedom of choice | |
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| Are we permitted to enhance (or reduce) intelligence? | |
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| The moral image of nurture | |
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| A moral and developmental parity of genes and environment | |
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| Manufacturing humans | |
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| Enhancement and bad parenting | |
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| The limited powers of genetic engineers | |
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| Are enhancements problematic because they are positionally valuable? | |
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| Regulating the pursuit of positional value | |
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| Our Postliberal Future | |
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| Two biotechnological tendencies: polarisation and homogenisation | |
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| Distributing access to enhancement technologies | |
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| Reducing the burden of universal access | |
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| Biotechnology's threat to citizenship | |
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| The importance of reciprocity | |
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| The threat of homogenization | |
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| Prejudice and enhancement | |
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| Kitcher and Buchanan et al. | |
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| On resisting morally defective environments | |
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| A parallel between GM humans and GM food | |
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| The ethics of shifting bigotry's burden | |
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| Enhanced humans when? | |
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| The Precautionary Principle and enhancement technologies | |
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| The real problem with developing enhancement technologies | |
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| A clash of moral gestalts | |
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| A biotechnological Catch-22 | |
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| Once we have traversed the ethically impossible passage | |
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| Further readings on human enhancement | |
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| Bibliography | |
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| Index | |