The world today has 6.8 billion people...that's headed up to about 9 billion. If we do a really great job on vaccines, health care, reproductive health services, we could lower that by perhaps 10 to 15 percent.

You’ve got to give great tools to small teams. Pick good people, use small teams and give them great tools so that they are very productive in terms of what they are doing.

That it's a worldwide thing that families are better off.

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

Success is a lousy teacher. It seduces smart people into thinking they can't lose.

President [George] Bush made the U.S. absolutely the leader, between its own PEPFAR, and it's been by far the biggest Global Fund donor. That's a legacy.

Almost every way we make electricity today, except for the emerging renewables and nuclear, puts out CO2. And so, what we're going to have to do at a global scale, is create a new system. And so, we need energy miracles.