I trace the inequality to a particular set of decisions that we took when we lowered the tax rate from 91% down to very low levels at the top, where we stripped away regulations. So the result of that was not a more dynamic economy, but a more unequal society. We tried the experiment of trickle-down. A third of a century later, we can say fairly definitively that it was a failure.

Governments can enhance growth by increasing inclusiveness. A country's most valuable resource is its people. So it is essential to ensure that everyone can live up to their potential, which requires educational opportunities for all.

I think in part the reason is that seeing an economy that is, in many ways, quite different from the one grows up in, helps crystallize issues: in one's own environment, one takes too much for granted, without asking why things are the way they are.

But individuals and firms spend an enormous amount of resources acquiring information, which affects their beliefs; and actions of others too affect their beliefs.

The protesters have called into question whether there is a real democracy. Real democracy is more than the right to vote once every two or four years. The choices have to be meaningful. But increasingly, and especially in the US, it seems that the political system is more akin to "one dollar one vote" than to "one person one vote". Rather than correcting the market failures, the political system was reinforcing them.

Trump is particularly unfit to serve because he approaches these without any view of what the truth is, and he approaches these with an enormous amount of prejudice. You cannot begin saying we want to solve the problem when you have a mindset that is against the Mexicans, against Islamists.

There is a growing consensus that the European systems have worked better than the American: They have been able to deliver better health care to more people at lower cost.