The difference between people who can read and write and those who can't is just absolutely astronomical.

Those of us of a certain age grew up expecting that by now we would have Rosie the Robot from 'The Jetsons' in our house. And all we've got is a Roomba.

The definition of who's literate and who's not keeps changing. So, in Neanderthal times, if you painted on a cave wall, that was enough to transmit how you hunt, how you eat, how you cook, how you dress, and we can read about that.

One of the lessons that I hope people will take out is the extreme dependence simply on the financial sector is really dangerous.

Borlaug would be one figure that I think fundamentally changed India, China, all of Southeast Asia, and gave them the time to be able to build on other things.

Try to live without something digital - without digital code for about two hours, very hard to do if you're awake.

As countries appear and disappear, then I began to ask, what makes countries successful? And it turns out, after a long slog through geographies and ethnicities and all kinds of variables, it's the ability to adapt and adopt, what Darwin talked about.