A somber weariness has settled in across Western democracies in the aftermath of the Paris attacks. Defeating and destroying the so-called Islamic State with military force has won broader support. But most realize that the challenge will require a complex set of policy responses, far beyond aerial bombardments to liberate territory controlled by the group in Syria and Iraq. Although there is not yet any consensus about what such a long-term strategy should look like, some new ideas are emerging. To begin with, the old debate over how to distinguish between the threat posed by al-Qaida and the newer one […]