Walt, Stephen. "ISIS as Revolutionary State." Foreign Affairs. November/December 2015.
To many who have witnessed ?its brutal tactics and religious extremism, the Islamic State, or ISIS, seems uniquely baffling and unusually dangerous. According to its leaders’ own statements, the group wants to eliminate infidels, impose sharia worldwide, and hasten the arrival of the Mahdi. ISIS' foot soldiers have pursued these goals with astonishing cruelty. Yet unlike the original al Qaeda, which showed little interest in controlling territory, ISIS has also sought to build the rudiments of a genuine state in the territory it controls. It has established clear lines of authority, tax and educational systems, and a sophisticated propaganda operation. It may call itself a “caliphate” and reject the current state-based international system, but a territorial state is what its leaders are running. As Jürgen Todenhöfer, a German journalist who visited territory in Iraq and Syria controlled by ISIS, said in 2014, “We have to understand that ISIS is a country now.”