Creator of Facebook
Age: 23
Zuckerberg was a 19-year-old Harvard student when he launched his social network for students. Three years later, Facebook is open to anyone and is the sixth most visited site on the Internet, with some 24 million users and enough clout to turn down a reported billion-dollar buyout offer from Yahoo (and to make us regret putting him last year on our online-only list of the 10 Who Don't Matter). Age: 23
View all candidates
Tell us who you think matters now -- and why
