The Islamic State burst onto the Middle East scene as an entity whose conduct and very essence challenge the existing regional order. With its military conquests in Iraq and Syria, its establishment of branches elsewhere in the Middle East and beyond, its state-like governance in the areas under its control, and the cruelty it typically exhibits, the Islamic State has become the focus of regional and international interest and concern. The articles compiled in The Islamic State: How Viable Is It? examine ways of dealing with one of the most salient military, sociopolitical, cultural, and...