Philanthropy should be taking much bigger risks that business. If these are easy problems, business and government can come in and solve them.

Digital technology has several features that can make it much easier for teachers to pay special attention to all their students.

The leader needs to create an environment in which people can analyze the situation and develop a good response.

We need to get a broader awareness. People say climate change is really bad, but painting that picture of what you're putting at risk.

Should surveillance be usable for petty crimes like jaywalking or minor drug possession? Or is there a higher threshold for certain information? Those aren't easy questions.

Sorghum is kind of unusual. It can go to very high heats, but it's not as productive in most environments as maize is.

I do think this next century, hopefully, will be about a more global view. Where you don't just think, 'Yes, my country is doing well,' but you think about the world at large.