Over time, the more we bring China into the world, the more the world will bring freedom to China.

First, I worry about climate change. It's the only thing that I believe has the power to fundamentally end the march of civilization as we know it, and make a lot of the other efforts that we're making irrelevant and impossible.

If you wanna maintain 20 percent of the world's income with 4 percent of the world's people, you gotta first of all have more shared prosperity and shared growth.

I've been talking about income inequality in America for twenty years, and when I was president, people didn't pay much attention to it, probably because wages were going up. But I don't think I've given a single solitary speech since I left office that I hadn't talked about it. It's a problem around the world and within the United States. So these people have put that on the agenda.

We are a people of faith. We have been so secure in that faith that we have enshrined in our Constitution protection for people who profess no faith. And good for us for doing so. That is what the First Amendment is all about.

In a world with no systems, with chaos, everything becomes a guerilla struggle, and this predictability is not there. And it becomes almost impossible to save lives, educate kids, develop economies, whatever.

In today's knowledge-based economy, what you earn depends on what you learn. Jobs in the information technology sector, for example, pay 85 percent more than the private sector average.