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.

Macroeconomic policy can never be devoid of politics: it involves fundamental trade-offs and affects different groups differently.

The IMF insisted that both Russia and Brazil maintain their currency at over-valued levels. Who are you protecting when you try to maintain that exchange rate by having high interest rates? You're protecting domestic and foreign firms that have gambled on the exchange rate. And who is paying the price? The small businesses that did not gamble [and no longer can afford loans], the workers who are going to be put out of jobs.

For instance, one of the costs of the war is that soldiers today get very seriously injured but stay alive, and we can keep them alive but at an enormous price.

If the President asked you to help, I don't think anybody could refuse, unless one felt that one couldn't be effective.

In the U.S., you couldn't have job creation with interest rates of 30 or 40 percent. They had a philosophy that said job creation was automatic. I wish it were true. Just a short while after hearing, from the same preachers, sermons about how globalization and opening up capital markets would bring them unprecedented growth, workers were asked to listen to sermons about "bearing pain." Wages began falling 20 to 30 percent, and unemployment went up by a factor of two, three, four, or ten.

For 60 years, since World War II, we have been trying to create a rules-based system, a global economic system. We understand that what makes our economy function is what we call the rule of law, and what is true domestically is also true internationally. It is important to have rules by which we govern our relations with other countries.