In the chaos since the vote last week in the United Kingdom to leave the European Union, maybe the biggest unanswered question is how much more damage angry voters in big democracies are willing to do to themselves.
The specifics of what's to happen in the U.K. economy can't yet be known, of course, but I've yet to see a thoughtful analysis suggest that the economic lives of people in the U.K. are about to get better.
They are going to get worse, maybe much worse. That was crystal clear up through the day of the vote, and more than half of those who voted in the U.K. chose to leave anyway.
So much for the idea that people just vote in their own self-interest.
That kind of voter behavior is one troubling part of the news on the so-called Brexit, or British exit from the E.U. If voters in a rock of stability like the U.K. can make this kind of move, voters elsewhere can, too.
There is a presidential vote to be held here this year, of course. Presidential candidate Donald Trump, by promising this week to tear up our country's international trade agreements, sounds quite a lot like the champions behind the Brexit.
It still seems remarkable that the British prime minister, David Cameron, ever thought this vote was a good idea. He suggested it to mollify longtime skeptics of greater economic integration with Europe in his own Conservative Party, only to have the referendum blow up in his face and likely end his political career.
In the spirited campaigning before the vote, the pro-Brexit forces had to contend with one leading economic institution after another lining up to warn that the U.K. economy would take a body blow by leaving the E.U.