Perhaps a hundred years ago, America might have rightly claimed to have been the land of opportunity, or at least a land where there was more opportunity than elsewhere. But not for at least a quarter of a century. Horatio Alger-style rags-to-riches stories were not a deliberate hoax, but given how they’ve lulled us into a sense of complacency, they might as well have been.

It’s not that social mobility is impossible, but that the upwardly mobile American is becoming a statistical oddity. According to research from the Brookings Institution, only 58 percent of Americans born into the bottom fifth of income earners move out of that category, and just 6 percent born into the bottom fifth move into the top. Economic mobility in the United States is lower than in most of Europe and lower than in all of Scandinavia.

Another way of looking at equality of opportunity is to ask to what extent the life chances of a child are dependent on the education and income of his parents. Is it just as likely that a child of poor or poorly educated parents gets a good education and rises to the middle class as someone born to middle-class parents with college degrees? Even in a more egalitarian society, the answer would be no. But the life prospects of an American are more dependent on the income and education of his parents than in almost any other advanced country for which there is data.