Summary of The Terrorist Diaspora

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Since the shock of September 11, 2001, US officials have largely succeeded at protecting the country from another foreign attack, and now ISIS is on the run from its former strongholds in Iraq and Syria. Those victories are just part of the story, however. ISIS is poised to establish a virtual caliphate even as it loses its geographic territory, as Rand Corporation analyst Colin P. Clarke explains. What’s more, homegrown jihadists have managed to kill 95 people in the United States. This sobering but measured report lays out how the United States can better prepare for future terrorism.

In this summary, you will learn

  • Why ISIS will live on, even after it loses its physical territory;

  • Why remaining ISIS fighters pose a threat; and

  • Why the United States has so far succeeded at keeping out foreign fighters.


About the Author

Colin P. Clarke is a political scientist at the Rand Corporation.



Some 60,000 fighters belonging to the Islamic State in Iraq and Syria (ISIS) have been killed since mid-2014. Yet despite the staggering body count, ISIS isn’t going away. The caliphate proved remarkably alluring to recruits throughout the world, who poured in to Iraq and Syria from dozens of nations, including the United States, France, Germany, the United Kingdom and Belgium. Now, some of those foot soldiers have been moving to towns in the Euphrates River Valley, once thought to be secured. Other militants are leaving Iraq and Syria to wage jihad in new areas. This terrorist diaspora is poised to foment more wars and establish new terrorist cells.

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