Two mass murders reveal how difficult—and important—it is to correctly identify terrorism when it occurs.
Protests scheduled in nine American cities for Saturday will provide a sense of where the movement is headed.
The violence ISIS carries out in the west provides fodder for anti-Muslim attackers, and violence against Muslims feeds back into the ISIS narrative.
How a self-published, racist novel changed white nationalism and inspired decades of violence
The Islamic State isn’t succeeding because of the strength of its narrative. It’s succeeding because it can mobilize a microscopic minority.
Even with fewer clicks
Why do people travel abroad to take part in somebody else’s violent conflict?
The militant group that conquered northern Iraq is deploying a sophisticated social-media strategy.
In the timeline of the hijackers' movements in the months before the attacks, New Mexico-born Awlaki and his followers seem to turn up nearly every step of the way
What's driving jihadist self-starters to break from the world's most famous terrorist group?