I do not argue that nature is sacrosanct in the sense that we must never tamper with nature. That would disempower, really, all of medicine. That would mean that we can't combat dread diseases - malaria, polio, all of which are given by nature, if one thinks about it.

Over the past three decades, markets and market thinking have been reaching into spheres of life traditionally governed by non-market norms. As a result, we've drifted from having a market economy to becoming a market society.

What intrigued me most was not the technology as such but the questions about the human goods, the fundamental human values and virtues that are raised by debates over biotechnology.

I think it would be a great tragedy to devote medical resources and genetic technological breakthroughs to purposes that are not to do with health or medicine, but instead are to do with satisfying the desires that are created by the consumer society.

Parenthood is a school for humility. We can't choose the precise traits of our children, and that is morally important. It teaches us what William May, a theologian whom I greatly admire, calls "an openness to the unbidden."

The norm of unconditional parental love, I think, depends on the fact that we don't pick and choose the traits of our children in the way that we pick and choose the features of a car we might order, or a consumer good.

A market economy is a tool - a valuable and effective tool - for organizing productive activity. A market society is a way of life in which market values seep into every aspect of human endeavour. It's a place where social relations are made over in the image of the market.