How has the United States economy gotten to this point?

It’s not just the apparent recession. Recessions happen. If you tried to build an economy immune to the human emotions that produce boom and bust, you would end up with something that looked like East Germany.

The bigger problem is that the now-finished boom was, for most Americans, nothing of the sort. In 2000, at the end of the previous economic expansion, the median American family made about $61,000, according to the Census Bureau’s inflation-adjusted numbers. In 2007, in what looks to have been the final year of the most recent expansion, the median family, amazingly, seems to have made less  about $60,500.

This has never happened before, at least not for as long as the government has been keeping records. In every other expansion since World War II, the buying power of most American families grew while the economy did. You can think of this as the most basic test of an economy’s health: does it produce ever-rising living standards for its citizens?

In the second half of the 20th century, the United States passed the test in a way that arguably no other country ever has. It became, as the cliché goes, the richest country on earth. Now, though, most families aren’t getting any richer.