Graeme Wood discusses The Way of the Strangers: Encounters with the Islamic State, his intimate new account of what drives the jihadi group’s true believers.

DEBORAH AMOS: I'd like to welcome you today to the Council on Foreign Relations meeting. Please enjoy your coffee while we are talking. In about 25 minutes we will ask for questions from the audienc…

Watch Linda Robinson, author in residence at the Johns Hopkins University's Philip Merrill Center for Strategic Studies and Francis J. West, correspondent at the Atlantic Monthly Press, assess the po…