Software was the key element that would determine how useable and how broadly applicable the machine was.

I believe technology will continue to become more affordable and more people will have the chance to use it. This will help more people get medical care and a good education.

There are ecosystems like coral reefs [at risk] through ocean acidification. Those are valuable things that we should protect.

In the same way that when the car got going, people thought it would be an electric car, people thought it would be a steam car.

It's really kind of cool to have solar panels on your roof.

I think philanthropy is also growing and catching on. Figuring out how the philanthropy sector, which is quite small compared to the private sector, which is the biggest by far, and then the governments, you know, even in these poor countries over time has to take on these key responsibilities. How does philanthropy accelerate that? Drive the kind of innovations, make sure they get used well. So it plays this kind of special role.

The Ebola epidemic can serve as an early warning wake-up call to get ready. If we start now, we can be ready for the next epidemic.