The most remarkable feature of the continuing power of America's elite—and its growing grip on the political system—is how little comment it arouses. Britain would be in high dudgeon if its party leaders all came from Eton and Harrow. Perhaps one reason why the rise of caste politics raises so little comment is that something similar is happening throughout American society. Everywhere you look in modern America—in the Hollywood Hills or the canyons of Wall Street, in the Nashville recording studios or the clapboard houses of Cambridge, Massachusetts—you see elites mastering the art of perpetuating themselves. America is increasingly looking like imperial Britain, with dynastic ties proliferating, social circles interlocking, mechanisms of social exclusion strengthening and a gap widening between the people who make the decisions and shape the culture and the vast majority of ordinary working stiffs.

There is also growing evidence that America is less socially mobile than many other rich countries. Mr Solon finds that the correlation between the incomes of fathers and sons is higher in the United States than in Germany, Sweden, Finland or Canada. Such cross-national comparisons are rife with problems: different studies use different methods and different definitions of social status. But Americans are clearly mistaken if they believe they live in the world's most mobile society.