You don't think that Mark Zuckerberg's "vision" has anything to do with the precedent set by prior entrepreneurs, including Larry and Sergei? Think about the consumer-facing internet companies that existed prior to 1999 when Larry and Sergei were in the early stages of their company versus what Zuckerberg had to look back on in 2005. A lot changed in those intervening years between 1999 and 2005.
