Tom Taulli

In just under a decade, Facebook has gone from a Harvard prodigy's dorm-room experiment to an essential part of the social life of hundreds of millions of children, teens, and adults across the globe. It's no surprise, then, that the company has been the subject of countless magazine articles, books, and even movies. But despite the extensive coverage that has been given to the company in the years since founder Mark Zuckerberg first took Facebook live on Harvard's server, one question remains unanswered: From a business standpoint, how, exactly, did Facebook do it?