For me, I think that the struggle around how to deal with Islam in the United States is the defining moral struggle of this half of the new century.

The question is: do we pay a little bit more now? Or do we pay a whole lot later? For the equivalent of a postage stamp a day for each American, we can put a price on carbon today that will send a signal to private capital to invest in the clean technologies of tomorrow. Taking a vast portfolio of new energy solutions to scale will ultimately drive down costs through competition.

We have gotten to the point where we're more like [Donald] Trump than Trump. Trump is hateful. Now you have liberals hating on love. Sometimes you have to fight fire with fire. There's nothing wrong with that. But sometimes you have to fight fire with water. I'm happy to fight it either way.

Now, here's a good question: should serious people focus on global political instability - terrorism, failing states, nuclear weapons - or should we focus on global climate instability - droughts, floods, extreme weather? Here's the correct answer: yes, both, because climate disruption will make every other national security problem worse.

You have a new media system and Donald Trump emerged as a new master of it.

I'm the first one in my family born with all my rights. I'm a ninth generation American.

There are only two ways to have a middle class in your country: either you have highly skilled manufacturing jobs, or you have a highly skilled, well trained, knowledge-based workforce. In other words, college.