Climate change is a reality.

The only surprise about the economic crisis of 2008 was that it came as a surprise to so many.

It's actually a tribute to the quality of economics teaching that they have persuaded so many generations of students to believe in so much that seems so counter to what the world is like. Many of the things that I'm going to describe make so much more common sense than these notions that seem counter to what one's eyes see every day.

World War II was really unusual, because America was in the Great Depression before. So the war did help the US economy to get securely out of this decline. This time, the war [in Iraq] is bad for the economy in both the short and long run. We could have spent trillions in research or education instead. This would have led to future productivity increases.

People at the top spend less money than those at the bottom so when you have redistribution toward the top, aggregate demand goes down. Unless you intervene, you're going to have a weak economy unless something else happens. That something else could be a bubble. The United States tried a tech bubble and a housing bubble, but those were not sustainable answers. So I view inequality as a fundamental part of our macroeconomic weakness.

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 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.