The Brookings Iraq Index presents numerical information on a range of security, economic, and political indicators of pertinence to the future of that country as well as the U.S. role within it. The Index was originally created in the early years of the 2000s, after a U.S.-led coalition overthrew Saddam Hussein, and sought to help Iraqis build a state that could avoid dictatorship and extremism going forward. Our goal, then and now, is to present a wide enough array of information to gauge many aspects of the effort, without...