Life is a slippery thing to define, but it consists of two very different skills: the ability to replicate, and the ability to create order. - Matt Ridley

Rational optimism holds that the world will pull out of the current crisis because of the way that markets in goods, services and ideas allow human beings to exchange and specialise honestly for the betterment of all. So this is not a book of unthinking praise or condemnation of all markets, but it is an inquiry into how the market process of exchange and specialisation is older and fairer than many think and gives a vast reason for optimism about the future of the human race. Above all, it is a book about the benefits of change. I find that my disagreement is mostly with reactionaries of all political colours: blue ones who dislike cultural change, red ones who dislike economic change and green ones who dislike technological change.

The obsession with which those on the right resist Charles Darwin’s insight – that the complexity of nature does not imply a designer – matches the obsession with which those on the left resist Adam Smith’s insight – that the complexity of society does not imply a planner.

How much more generous it would be if, instead of writing parables about childhood wounds, psychologists were to accept that some differences between the sexes just are, that they are in the nature of the beasts, because each sex has an evolved tendency to develop that way in response to experience.