How extreme voices online reshaped the American conversation

A new book sheds light on how social media is reshaping American ideology. “Antisocial: Online Extremists, Techno-Utopians, and the Hijacking of the American Conversation” goes inside the world of conspiracists, internet trolls, and white supremacists who have played a role in the rise of the so-called alt-right. Author Andrew Marantz, a staff writer at The New Yorker, joined CBSN to discuss.