A bloody summer, with attacks from Orlando to Nice to Bangladesh, has left many wondering what compels an individual, whether a low-level criminal with a history of domestic violence or a student at an elite private school, to massacre civilians in the name of the so-called Islamic State or another extremist group. Even more confounding is how to stop them. That question isn’t new, or unique to the rise of the Islamic State. For years, governments, analysts and observers have worked to understand the drivers of radicalization and how best to block the road to extremism, particularly among youth. In […]