The IM Conversation In Which 19-Year-Old Zuckerberg Decided To Build Facebook
businessinsider.com
businessinsider.com
From the article - it's very clear that he was simply trying to stick something but had no clue as to what he was trying to achieve.
I think most business are like that. They really don't know what they are trying to achieve. It's actually after they become successful that they connect the dots (as Steve Jobs would put it) and say how they solved the great problems of our time!
The article was very nice read!