Many of today’s terrorist groups don’t just use the internet, they exist almost entirely on it. What do the online origins of these movements reveal about how to stop them? Counterterrorism expert Rita Katz joined Richard Aldous to talk about her new book, Saints and Soldiers: Inside Internet-Age Terrorism, From Syria to the Capitol Siege (https://www.saintsandsoldiersbook.com), and how the online cultures of these movements—far more than their ideologies and leaders—create today’s terrorists and shape how they commit “real world” violence.

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