By 2035, there will be almost no poor countries left in the world.

If you withdraw the incredible focus on polio, it will spread back, and in poor countries you'll get something like 100,000 cases a year. So by being very intense and getting the cases down to zero, what you do is you avoid all the future cases.

When you have a fortune that is almost hard to imagine, the best thing is not to pass that on to one's children. That distorts their life situation.

On my desk I have three screens, synchronized to form a single desktop. I can drag items from one screen to the next. Once you have that large display area, you'll never go back, because it has a direct impact on productivity.

There certainly is a case to be made that taxes should be more progressive.

By helping us to be more productive, technology lets us to spend less time focusing on survival, and more on solving other challenges.

I'm a big believer that as much as possible, and there's obviously political limitations, freedom of migration is a good thing.