I think it's a problem that we don't have more companies like Facebook. It shouldn't be the only company that's doing this well.

In a world where wealth is growing, you can get away with printing money. Doubling the debt over the next 20 years is not a problem.

Had the people who started Facebook decided to stay at Harvard, they would not have been able to build the company, and by the time they graduated in 2006, that window probably would have come and gone.

I believe we are in a world where innovation in stuff was outlawed. It was basically outlawed in the last 40 years - part of it was environmentalism, part of it was risk aversion.

I think anything that requires real global breakthroughs requires a degree of intensity and sustained effort that cannot be done part time, so it's something you have to do around the clock, and that doesn't compute with our existing educational system.

In the '30s, the Keynesian stuff worked at least in the sense that you could print money without inflation because there was all this productivity growth happening. That's not going to work today.

People don't want to believe that technology is broken. Pharmaceuticals, robotics, artificial intelligence, nanotechnology - all these areas where the progress has been a lot more limited than people think. And the question is why.