Want to become a terrorist?  It's easier than you think to get sucked in, writes New Scientist.

The anthropology of terrorism makes for compelling fieldwork and Scott Atran is on a quest to understand what makes people kill and die for a cause.   He says he has met with the Hamas high command in Damascus, unpacked the web of connections behind the 9/11 and 2004 Madrid train attacks and been forced to flee for his life from militants in Indonesia and Pakistan unsettled by his probings.

His main finding is that terrorist organizations tend not to be the sophisticated, well-ordered hierarchies that we commonly suppose, but loose networks of friends and family who die not just for a cause but for each other.