Over his illustrious career, John Harris has explored the most challenging bioethical questions with insight, engaging wit, and eloquence. In Enhancing Evolution, Harris does it again. He argues that it is not just an option but an obligation for people to use available biomedical technologies to enhance their own--and their children's--physical and mental abilities. Harris rightly deserves his reputation for fearlessly following his ethical arguments wherever they lead.

Guilt. It comes naturally to me as a Jew and a Liberal.

Anyone who lives in Washington and has an official position viscerally understands the cost of a lack of privacy. Every dinner - especially ones with a journalist in attendance - is preceded by the mandatory, 'This is off the record.' But everyone also knows, nothing is really 'off the record.

You have the quality of your work and the integrity with which you do it.

By establishing a social policy that keeps physician-assisted suicide and euthanasia illegal but recognizes exceptions, we would adopt the correct moral view: the onus of proving that everything had been tried and that the motivation and rationale were convincing would rest on those who wanted to end a life.

We're all on a continuous journey to try and fix our mistakes and flaws. And, believe me, I've got plenty of them.

We don't have enough solid organs for transplantation; not enough kidneys, livers, hearts, lungs. When you get a liver and you have three people who need it, who should get it? We tried to come up with an ethically defensible answer. Because we have to choose.