Security is, I would say, our top priority because for all the exciting things you will be able to do with computers - organizing your lives, staying in touch with people, being creative - if we don't solve these security problems, then people will hold back.

Africa is on the rise.

I hope corporations will dedicate a percentage of their top innovators' time to issues that could help people left out of the global economy. This kind of contribution is even more powerful than giving cash or offering employees' time off to volunteer. It is a focused use of what your company does best. It is a great form of creative capitalism, because it takes the brainpower and makes life better for the richest, and dedicates some of it to improving the lives of everyone else.

I'm a great believer that any tool that enhances communication has profound effects in terms of how people can learn from each other, and how they can achieve the kind of freedoms that they're interested in.

Well, jobs are a great thing. You have to be a bit careful: If you raise the minimum wage, you’re encouraging labor substitution and you’re going to go buy machines and automate things - or cause jobs to appear outside of that jurisdiction. And so within certain limits, you know, it does cause job destruction. If you really start pushing it, then you’re just making a huge trade-off.

If you're smart, you often want a feedback loop so you know if what you've done is... is right.

People care a lot that the USA is well run, and people globally expect us to do things in upgrading science and more.