The spread of online information isn't just good for charities. It's also good for donors. You can go to a site like Charity Navigator, which evaluates nonprofits on their financial health as well as the amount of information they share about their work.

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.

We were young, but we had good advice and good ideas and lots of enthusiasm.

We all know that there are these exemplars who can take the toughest students, and they'll teach them two-and-a-half years of math in a single year.

The PC has improved the world in just about every area you can think of. Amazing developments in communications, collaboration and efficiencies. New kinds of entertainment and social media. Access to information and the ability to give a voice people who would never have been heard.

Well, no one gives aid to Zimbabwe through the Mugabe government.

When I was in my 40s, Microsoft was my primary activity.