back. As network theorist and military analyst John Arquilla put it: We killed “about 20 of Al Qaeda’s ‘number threes’ over the past decade, but everyone in a network is number three.” To our way of thinking, an organization without a predictable methodology or clear chain of command wasn’t really an organization at all—from our vantage, AQI should have devolved into internal anarchy. But it didn’t. It continued to function as persistently and implacably as ever, demonstrating a coherence of purpose and strategy.