The believer: How an introvert became the leader of the Islamic State | Brookings Institution: "Many of the ex-Baathists at Bucca, some of whom Baghdadi befriended, would later rise with him through the ranks of the Islamic State. “If there was no American prison in Iraq, there would be no [Islamic State] now,” recalled the inmate interviewed by The Guardian. “Bucca was a factory. It made us all. It built our ideology.” The prisoners dubbed the camp “The Academy,” and during his ten months in residence, Baghdadi was one of its faculty members.