Every math curriculum in the world is based on the idea of hand-calculating, and most of what you're teaching is how to calculate. And I think the resistance to this is very variable.

It's a very bad thing when people exterminate other people, and people persecute minorities.

We are already seeing a degree of instability in the world because Obama seems to have consciously wanted to step back. Donald Trump is going to be "Obama squared," a more extreme version of the same thing.

If the Arab world today looked like Tunisia, it would be a huge blow for the extreme ideologies. But Tunisia needs more support than it is getting, particularly from their close neighbors in Europe who have a great stake in North Africa.

I've met quite a few dictators up close and personal in my life.

I certainly think it's important to speak up and say how unacceptable Donald Trump is. I'm always more than willing to do that.

I think, in the longer view of things, there is a very powerful pull in the direction of participatory government.