Sam Harris speaks with Andrew Marantz about his book "Antisocial: Online Extremists, Techno-Utopians, and the Hijacking of the American Conversation." They discuss the effect of social media on politics, the distinction between publishers and platforms, the problem of guilt by association, getting too close to interview subjects, the confusing nature of troll culture, the notion of "dog whistles," how to respond to the current reality of racism, and other topics.

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