It is not a zero sum game. The simple idea of the gains from trade lies at the heart of the modern and the ancient economy, not the power of capital. There is nothing else to it.

Intelligence will become more and more collective; innovation and order will become more and more bottom-up.

Prosperity has brought complications. Our lives are busier, faster, more stressful. They're nostalgic for a simpler, slower time.

The message from history is so blatantly obvious - that free trade causes mutual prosperity while protectionism causes poverty - that it seems incredible that anybody ever thinks otherwise. There is not a single example of a country opening its borders to trade and ending up poorer.

It is the assumption of this book that there is a typical human nature. It is the aim of this book to seek it. Just like a surgeon, a psychiatrist can make all sorts of basic assumptions when a patient lies down upon the couch. He can assume that the patient knows what it means to love, to envy, to trust, to think, to speak, to fear, to smile, to bargain, to covet, to dream, to remember, to sing, to quarrel, to lie. The 'smile' of a baboon is a threat; the smile of a man is a sign of pleasure: it is human nature, the world over.

You need to understand how human beings bring together their brains and enable their ideas to combine and recombine, to meet and, indeed, to mate. In other words, you need to understand how ideas have sex.

Considering the way evolution works, it should not be surprising if every man has got a Don Giovanni somewhere inside him.