All posts by Marc Sageman

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The Stagnation of Research on Terrorism

September 11, 2001, triggered a wave of interest in research on terrorism. Hundreds of books, thousands of articles, and millions of comments have been posted on the Web. The federal government has stimulated research by infusing millions of dollars into the field. After the Boston Marathon bombings, it is time to reflect on what has been learned over the past 11 and a half years.

The surprise is that, over all, the same stale arguments about “how can this happen?” are debated over and over …