The power of capitalism to mediate the gap between rich and poor is pretty incredible. Indeed, I think, year by year, the gap gets less.

In K-12, almost everybody goes to local schools. Universities are a bit different because kids actually do pick the university. The bizarre thing, though, is that the merit of university is actually how good the students going in are: the SAT scores of the kids going in.

Some very poor countries run great vaccination systems, and some richer ones run terrible programs.

This antitrust thing will blow over.

If you're taking care of your family and society and are comfortable you can start to think about helping those most in need globally. That's how we became engaged in those things.

In programming when you're making a change you have to know all the affected places, and you have to be able to model in your head what the performance impact will be.

Even for the very best programmers ah, sometimes you'll see someone else's program or somebody will come along and they'll show you what can be done in a simpler way.