The core strategy used by the Islamic State to attract supporters and unhinge opponents is hardly a mystery, although few people engaged in policy and decision-making seem to have taken note. Its manifesto for action, a required playbook for the Islamic State’s emirs (religious, political and military leaders), is The Management of Savagery/Chaos. It was written over a decade ago, under the pseudonym Abu Bakr Naji, for the Mesopotamian wing of Al-Qaeda that would become ISIS. Think of the recent massacres in Paris, Beirut or Bamako, and then consider some of the book’s axioms.