Communism was a great system for making people equally poor - in fact, there was no better system in the world for that than communism. Capitalism made people unequally rich.

By 'flat' I did not mean that the world is getting equal. I said that more people in more places can now compete, connect and collaborate with equal power and equal tools than ever before. That's why an Indian in Bangalore can take care of the office work of American doctors or read the X-rays of German hospitals.

No matter what your profession – doctor, lawyer, architect, accountant – if you are an American, you better be good at the touchy-feely service stuff, because anything that can be digitized can be outsourced to either the smartest or the cheapest producer.

Oil is a tangible commodity, so there is a global market. The fact that we may need less may affect the global price because we're big consumers: we probably take about a quarter of global demand. But if suddenly, let's just use a crazy example, fighting in the Middle East led to the closure of the Strait of Hormuz and no oil could get out through the Strait of Hormuz, well that would affect China, India, Europe, it will affect the whole global economy. It will affect us, too, then.

We are entering a hyperconnected world where every boss now has more access, cheap access to cheap labor, cheap genius, cheap robot, cheap software, and then this world averages over. There is only one answer to that, and that is to get everyone as close as possible to some form of post-secondary education, it could be vocational, it can be liberal arts, it can be science and technology.

I said that more people in more places can now compete, connect and collaborate with equal power and equal tools than ever before.

I'm from Minnesota. I'm optimistic. I mean, that's just who I am.