It's likely Zuckerberg had some vision very early on of just how big it could become (and the value of a real identity - not a false identity [1]) According to

It's likely Zuckerberg had some vision very early on of just how big it could become (and the value of a real identity - not a false identity [1]) According to Robert Scoble, the controlled pacing is still going on: "Here’s the phases of Facebook: Phase 1. Harvard only. Phase 2. Harvard+Colleges only. Phase 3. Harvard+Colleges+Geeks only. Phase 4. All those above+All People (in the social graph). Phase 5. All those above+People and businesses in the social graph. Phase 6. All those above+People, businesses, and well-known objects in the social graph. Phase 7. All people, businesses, objects in the social graph." http://scobleizer.com/2009/03/21/why-facebook-has-never-listened-and-why-it-definitely-wont-start-now/ http://scobleizer.com/2009/03/21/why-facebook-has-never-list... [1] http://www.unc.edu/depts/jomc/academics/dri/idog.html http://www.unc.edu/depts/jomc/academics/dri/idog.html