According to Forbes
"What the CIA failed to do in 60 years, Zuck has done in 7: knowing what 800 million people--more than 10% of the world's population--think, read and listen to, plus who they know, what they like and where they live, travel, vote, shop, worship. U.S. users spend more time on Facebook--on average 6.3 hours a month--than on any other site. The Harvard dropout is now creating his own monetary system, Facebook Credits, to facilitate transactions and profits. With a net worth of $17.5 billion, he is now America's 14th-richest man. 2011 Highlight: The movie inspired by his life, The Social Network, which depicts Zuckerberg as a coldhearted dweeb, won 3 Oscars."
Microsoft's software wizard and the world's second-richest man Bill Gates is however 5thMost Powerful Person and Google co-founders Sergey Brin and Larry Page shares 30th Spot on the list.