Bill Gates hopes to solve some of the world's biggest problems using a new kind of philanthropy. In a passionate and, yes, funny 18 minutes, he asks us to consider two big questions and how we might answer them. (And see the Q&A on the TED Blog.)About Bill Gates
A passionate techie and a shrewd businessman, Bill Gates changed the world once, while leading Microsoft to dizzying success. He plans to do it again with his very own style of philanthropy. Full bio and more links