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Martijn Kriens discusses the power of social media and its role in crisis communication and social influence. He notes the large number of daily users of platforms like Facebook, Twitter, and Hyves in the Netherlands. He analyzes several case studies where social media played a key role, such as in political debates and elections, as well as in organizing unplanned events like Project X parties. Kriens argues this shows how social media allows for cooperation without coordination at large scales and influences traditional media. Social media is shaping new realities of how influence happens in decentralized networks of organized individuals.