The World’s Youngest Billionaires, Ranked by Online Influence

Billion Dollar Baby
Some of them were born into their vast piles of cash, whereas others of them earned their fortunes. Four of them made their bread via an association with Facebook. All ten of them, however, and whatever their stories, are under 40 and worth over a billion bucks. Click through here to see how they compare in terms of presence, impact, and influence on the Web.