The revolutions sweeping the Middle East in 2011 were unlike any the world had ever seen. Brutal regimes that had been in power for many decades were suddenly swarmed by unstoppable mobs of freedom-seekers. Now, Wael Ghonim, one of the key figures behind the Egyptian uprising, talks with Arianna Huffington about what happened and presents lessons for all of us on how to unleash the power of crowds.

• Revolution 2.0 with Wael Ghonim

Wael Ghonim was a little-known 30-year-old Google executive in the fall of 2010 when he anonymously launched a Facebook page to protest the death of one Egyptian man at the hands of security forces. The page’s followers expanded quickly and moved from online protests to toppling the regime.