We have to find a way to make the aspects of capitalism that serve wealthier people serve poorer people as well.

Like almost everyone who uses e-mail, I receive a ton of spam every day. Much of it offers to help me get out of debt or get rich quick. It would be funny if it weren't so irritating.

In a system of capitalism, as people's wealth rises, the financial incentive to serve them rises. As their wealth falls, the financial incentive to serve them falls, until it becomes zero. We have to find a way to make the aspects of capitalism that serve wealthier people serve poorer people as well.

As we have taken diarrhea and pneumonia down, even malaria down quite a bit, the portion of the days that are very early in that 5 years - the first month, the first day - it's about half now. Yet that's the part we understand the least.

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.

The flatter the corporate hierarchy, the more likely it is that employees will communicate bad news and act upon it.

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.