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As More Extremists Radicalize Online, Can Violence be Prevented?

The Christchurch mosque shooting was the clearest turning point: a mass murder that was, as the New York Times put it at the time, “of, and for, the Internet.” The gunman had teased the shooting on Twitter, announced it on the anonymous, fringe forum 8chan, a megaphone for extremist political views and hateful ideology, and it was live streamed on Facebook. On YouTube, Reddit, and elsewhere, the video of the shooting was repeatedly uploaded faster than the sites’ moderators could take it down.

Two Brains Are Better Than One: AI and Humans Work to Fight Hate

It started with a conversation. About two years ago, Claudia von Vacano, executive director of UC Berkeley’s social science D-Lab, had a chat with Brittan Heller, the then-director of technology and society for the Anti-Defamation League (ADL). The topic: the harassment of Jewish journalists on Twitter. Heller wanted to kick the offending trolls off the platform, and Vacano, an expert in digital research, learning, and language acquisition, wanted to develop the tools to do it. Both understood that neither humans nor computers alone were sufficient to root out the offending language.

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