There is no question that the Islamic State will be defeated in Mosul; the real question is what comes afterward. Can the post-Islamic State effort resolve the squabbling likely to arise over numerous issues and bring lasting stability to one of Iraq’s most diverse and challenging provinces? Failure to do so could lead to ISIS 3.0.
.. The challenge of Mosul and Nineveh is the considerable number of ethnic groups, religious sects, tribes and other elements that make up the province. Ultimately, we ensured that the provincial council included representatives of every district in Nineveh, of every major religion (Sunni, Shiite, Christian, Shabak), of each ethnic group (Arabs, Kurds, Yazidis, Turkmen), of every additional major societal element (Mosul University academics, businessmen, retired generals) and of each major tribe not already sufficiently represented... Thus, the most significant challenge in Mosul will not be to defeat the Islamic State; rather, it will be the task we faced there in 2003: to ensure post-conflict security, reconstruction and, above all, governance that is representative of and responsive to the people. All of this will have to be pursued largely by Iraqis, of different allegiances, without the kinds of forces, resources and authorities that we had... Leaders of the various Iraqi elements will likely have their own militias .... it was undone by an inability to get Iraqi authorities in Baghdad to approve initiatives we pursued in reconciliation with former Baath Party members cast out of work by the Coalition Provisional Authority’s de-Baathification decree and in providing work for the tens of thousands of Iraq soldiers also rendered unemployed by the authority... Importantly, Shiite militias should play no role in post-Islamic State security and governance.