New book explores social media’s role in growing the alt-right

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"Anti-Social: Online Extremists, Techno-Utopians, and the Hijacking of the American Conversation" takes an in depth look at the world of conspiracy theorists and the alt-right, who have used social media platforms as a vehicle for their destructive agenda. The book’s author, Andrew Marantz, joins Ali Velshi to discuss his findings.