Understanding capitalism is in some ways simple. At its best, capitalism rewards creators, makers and providers: the people and firms that create valuable things for others, like imaginative technologies and good food, cars and drugs.

The City of London has never been known for understanding technology and has never matched Silicon Valley's tradition of knowledgeable investment in technology start-ups, just as the U.K. government has never matched the vast investment made by the U.S. government.

Learning isn't something you should only do solo.

The wrongful arrest of tens of thousands of British Muslims after the September 11 attacks can be explained by the very poor intelligence the police had, and, just possibly, excused by the fact that a terrorist action in Britain linked to British Muslims would have been hugely damaging.

Women don't want to exchange places with men. Male chauvinists, science-fiction writers and comedians may favor that idea for its shock value, but psychologists say it is a fantasy based on ruling-class ego and guilt.

Modern science, then, so far from being an enemy of romance, is seen on every hand to be its sympathetic and resourceful friend, its swift and irresistible helper in its serious need, and an indulgent minister to its lighter fancies.

Our circadian biology, and the insatiable early-morning demands of a post-industrial way of life, denies us the sleep we vitally need.

When I came to MIT, there were four rubrics: science, art, design, and technology. And as you entered your degree, whether it was a master's or a Ph.D., if you were a citizen in one domain, you were a traveler in the other.