Is the movie The Social Network based on a true story?

Yes, the movie "The Social Network" is based on a true story. It follows the early years of Facebook and the rise of its co-founder, Mark Zuckerberg. The movie is based on Ben Mezrich's 2009 book "The Accidental Billionaires: The Founding of Facebook, a Tale of Sex, Money, Genius, and Betrayal." The book and the movie explore the legal battles and controversies that surrounded the creation of Facebook and Zuckerberg's relationships with fellow Harvard students Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Sean Parker. While some aspects of the movie have been dramatized for cinematic effect, it remains largely faithful to the real events and people involved in the founding of Facebook.