In the summer of 2014, the Iraqi government lost control of much of the country. Insurgents - including the Islamic State of Iraq and al-Sham (ISIS), former Ba 'thists, and an array of Sunni tribes - captured Mosul, and then much of western Iraq. Although complex factors lay behind these developments, this article focuses on one theme of central importance: attempts to consolidate power in Baghdad and the concomitant evisceration of Iraq 's constitution. When key provisions of a very decentralizing federal constitution were ignored or violated, the blowback from disenfranch ised groups in Iraq brough t the country to the brink of collapse.In early June 2014, the Islamic State of Iraq and al-Sham (ISIS) and a constellation of Sunni Arab tribes and former Ba'thists captured Mosul, Iraq's second largest city. Much of the Iraqi Armed Forces disintegrated, and the rest fled southward from the Sunni rebel advance.1 As most of the majority-Sunni Arab areas of the country quickly fell to the insurgents, Prime Minister Nuri al-Maliki's government scrambled to fortify Baghdad's defenses. Peshmerga (Kurdish fighters) of the Kurdistan Regional Government (KRG), meanwhile, took the opportunity to advance farther south and take control of virtually all the territories disputed between Erbil and Baghdad, including Kirkuk, which has some four percent of the world's proven oil reserves around it. As authorities in Baghdad stmggled to mount a response to the breathtaking developments, ISIS declared the establishment of a new Islamic caliphate straddling Syria and Iraq, and the KRG announced their intention to hold a referendum for Kurdish independence.2 More than ever before, the dissolution of Iraq suddenly appeared both likely and imminent.What precipitated such a collapse of one of the most important states in the Middle East and North Africa region? Rather than seeing a predetermined fate that doomed Iraq after the toppling of President Saddam Husayn, the explanation provided here focuses on agency - choices made within a structural context that offered real alternatives. The stmctural context presented huge difficulties to be sure, with a society and political system ravaged by wars, neighboring states meddling in Iraq, and a civil war raging next door in Syria since 2011. But explanatory weight needs to be assigned to the choices that Iraqi prime minister Nuri al-Maliki and his administration made over the last several years as well. Although Prime Minister Maliki likely pursued his poli- cies with the best intentions, the highest authorities of a state bear the greatest onus to strengthen, not weaken, its constitutional foundations. While many people warned that the 2005 Iraqi constitution's strongly decentralizing provisions could threaten Iraqi territorial integrity, subsequent developments and the current crisis demonstrate the opposite: key elements of the Constitution's robust provisions for decentralization and power-sharing were never respected, leading to the total alienation of Iraq's disparate Sunni Arab and Kurdish populations. Even some Iraqi Shi'i political groups appear dis- affected today,3 reviving old militias to oppose Baghdad's authority. As Prime Minister Maliki assiduously worked to concentrate power in his own hands, American policy makers continued to back him almost unconditionally. In doing so, they squandered the blood and staggering sums of money spent rebuilding Iraq.The following pages provide an overview of the key components of the Iraqi con- stitution that Prime Minister Maliki's administration eviscerated. While an exhaustive treatment of all the varied factors that led to the current crisis in Iraq remains impossi- ble to provide here, it is the author's contention that the 2005 Iraqi constitution, despite its necessary ambiguities on many issues, provided a legal and political structure that could have led the country to a much more propitious future. This would also have re- quired wise and inclusive leadership in Baghdad, of course. …