The Entrepreneurs of the Decade: 2000 to 2009

Robyn Twomey
8 of 17

Mark Zuckerberg of Facebook

We don't have much more to say than this: When the decade started, he was 15. Today, he is CEO of Facebook, a company that has become an indispensable part of the lives of 350 million users worldwide. And just wait for that IPO.