Social Media: The Wisdom and the Wiseguys

Andrew Marantz, editorial staffer at The New Yorker and the author of Antisocial: Online Extremists, Techno-Utopians, and the Hijacking of the American Conversation, tells the story of the development of social media with its promise of democratizing the media and the "gate crashers" (conspiracists, white supremacists, and trolls) who showed up next.