If you followed this economic crisis and you do not think that the world is getting flatter, you are not paying attention. We saw the entire global economy at one time acting totally in sync. The real truth is the world is even flatter than I thought. Our mortgage crisis is killing Deutsche Bank. You still don't think the world is flat?

Change your leaders, not your light bulbs.

What is the most entrepreneurial country in the Middle East today? It's Lebanon. Which country has no oil or gas? Lebanon. The same was true of Israel, the same was of Bahrain. You could see a real gradation. Turkey, for instance: no oil and gas, very entrepreneurial. You can either dig your future out of the ground or you can unlock the potential of your people.

No two countries that both had McDonald's had fought a war against each other since each got its McDonald's

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.

Scientists tend to focus on what they don't know more than what they do know. And there are a lot of things we still don't know about the climate. But we know the difference between climate variability and climate change, and right now the amount of carbon in the atmosphere is well outside the variability pattern - and that's quite quantifiable.

I was in Bangalore, India, the Silicon Valley of India, when I realized that the world was flat.