A careful rethinking of the Iraq War – MIT News
The term fog of war expresses the chaos and uncertainty of the battlefield. Often, it is only in hindsight that people can grasp what was unfolding around them.
Now, additional clarity about the Iraq War has arrived in the form of a new book by MIT political scientist Roger Petersen, which dives into the wars battlefield operations, political dynamics, and long-term impact. The U.S. launched the Iraq War in 2003 and formally wrapped it up in 2011, but Petersen analyzes the situation in Iraq through the current day and considers what the future holds for the country.
After a decade of research, Petersen identifies four key factors for understanding Iraqs situation. First, the U.S. invasion created chaos and a lack of clarity in terms of the hierarchy among Shia, Sunni, and Kurdish groups. Second, given these conditions, organizations that comprised a mix of militias, political groups, and religious groups came to the fore and captured elements of the new state the U.S. was attempting to set up. Third, by about 2018, the Shia groups became dominant, establishing a hierarchy, and along with that dominance, sectarian violence has fallen. Finally, the hybrid organizations established many years ago are now highly integrated into the Iraqi state.
Petersen has also come to believe two things about the Iraq War are not fully appreciated. One is how widely U.S. strategy varied over time in response to shifting circumstances.
This was not one war, says Petersen. This was many different wars going on. We had at least five strategies on the U.S. side.
And while the expressed goal of many U.S. officials was to build a functioning democracy in Iraq, the intense factionalism of Iraqi society led to further military struggles, between and among religious and ethnic groups. Thus, U.S. military strategy shifted as this multisided conflict evolved.
What really happened in Iraq, and the thing the United States and Westerners did not understand at first, is how much this would become a struggle for dominance among Shias, Sunnis, and Kurds, says Petersen. The United States thought they would build a state, and the state would push down and penetrate society. But it was society that created militias and captured the state.
Attempts to construct a well-functioning state, in Iraq or elsewhere must confront this factor, Petersen adds. Most people think in terms of groups. They think in terms of group hierarchies, and theyre motivated when they believe their own group is not in a proper space in the hierarchy. This is this emotion of resentment. I think this is just human nature.
Petersens book, Death, Dominance, and State-Building: The U.S. in Iraq and the Future of American Military Intervention, is published today by Oxford University Press. Petersen is the Arthur and Ruth Sloan Professor of Political Science at MIT and a member of the Security Studies Program based at MITs Center for International Studies.
Research on the ground
Petersen spent years interviewing people who were on the ground in Iraq during the war, from U.S. military personnel to former insurgents to regular Iraqi citizens, while extensively analyzing data about the conflict.
I didnt really come to conclusions about Iraq until six or seven years of applying this method, he says.
Ultimately, one core fact about the country heavily influenced the trajectory of the war. Iraqs Sunni Muslims made up about 20 percent or less of the countrys population but had been politically dominant before the U.S. took military action. After the U.S. toppled former dictator Saddam Hussein, it created an opening for the Shia majority to grasp more power.
The United States said, Were going to have democracy and think in individual terms, but this is not the way it played out, Petersen says. The way it played out was, over the years, the Shia organizations became the dominant force. The Sunnis and Kurds are now basically subordinate within this Shia-dominated state. The Shias also had advantages in organizing violence over the Sunnis, and theyre the majority. They were going to win.
As Petersen details in the book, a central unit of power became the political militia, based on ethnic and religious identification. One Shia militia, the Badr Organization, had trained professionally for years in Iran. The local Iraqi leader Moqtada al-Sadr could recruit Shia fighters from among the 2 million people living in the Sadr City slum. And no political militia wanted to back a strong multiethnic government.
They liked this weaker state, Petersen says. The United States wanted to build a new Iraqi state, but what we did was create a situation where multiple and large Shia militia make deals with each other.
A captains war
In turn, these dynamics meant the U.S. had to shift military strategies numerous times, occasionally in high-profile ways. The five strategies Petersen identifies are clear, hold, build (CHB); decapitation; community mobilization; homogenization; and war-fighting.
The war from the U.S. side was highly decentralized, Petersen says. Military captains, who typically command about 140 to 150 soldiers, had fairly wide berth in terms of how they were choosing to fight.
It was a captains war in a lot of ways, Petersen adds.
The point is emphatically driven home in one chapter, Captain Wright goes to Baghdad, co-authored with Col. Timothy Wright PhD 18, who wrote his MIT political science dissertation based on his experience and company command during the surge period.
As Petersen also notes, drawing on government data, the U.S. also managed to suppress violence fairly effectively at times, particularly before 2006 and after 2008. The professional soldiers tried to do a good job, but some of the problems they werent going to solve, Petersen says.
Still, all of this raises a conundrum. If trying to start a new state in Iraq was always likely to lead to an increase in Shia power, is there really much the U.S. could have done differently?
Thats a million-dollar question, Petersen says.
Perhaps the best way to engage with it, Petersen notes, is to recognize the importance of studying how factional groups grasp power through use of violence, and how that emerges in society. It is a key issue running throughout Petersens work, and one, he notes, that has often been studied by his graduate students in MITs Security Studies Program.
Death, Dominance, and State-Building has received praise from foreign-policy scholars. Paul Staniland, a political scientist at the University of Chicago, has said the work combines intellectual creativity with careful attention to on-the ground dynamics, and is a fascinating macro-level account of the politics of group competition in Iraq. This book is required reading for anyone interested in civil war, U.S. foreign policy, or the politics of violent state-building."
Petersen, for his part, allows that he was pleased when one marine who served in Iraq read the manuscript in advance and found it interesting.
He said, This is good, and its not the way we think about it, Petersen says. Thats my biggest compliment, to have a practitioner say it make them think. If I can get that kind of reaction, Ill be pleased.
Continue reading here:
A careful rethinking of the Iraq War - MIT News
- Iran says Iraq exempt from any Strait of Hormuz restrictions - Reuters - April 5th, 2026 [April 5th, 2026]
- Iran Clears Iraq to Use Strait of Hormuz - wsj.com - April 5th, 2026 [April 5th, 2026]
- Iraq War Vet Dem Rep.: The longer the war goes on, the more leverage Iran has - MS NOW - April 5th, 2026 [April 5th, 2026]
- U.S. tells Americans in Iraq to leave immediately amid threat from Iran-backed militias - NBC News - April 5th, 2026 [April 5th, 2026]
- Iran-backed militias are destroying Iraq. Baghdad must take them on. - Atlantic Council - April 5th, 2026 [April 5th, 2026]
- American journalist abducted in Iraq had just trained on what to do in case she was kidnapped: Colleague - ABC News - April 5th, 2026 [April 5th, 2026]
- Americans in Iraq warned to leave 'now' amid threats of imminent attacks - NBC News - April 5th, 2026 [April 5th, 2026]
- In Iran, Iraq and the U.S., Women Speak Out Against State Repression - Ms. Magazine - April 5th, 2026 [April 5th, 2026]
- New Iraq report urges stronger action to protect Christians and other religious minorities - christiantoday.com - April 5th, 2026 [April 5th, 2026]
- Drone strikes signal escalating threat to Iraqi oil sector - Iraq Oil Report - April 5th, 2026 [April 5th, 2026]
- 21 games later: Iraq back at the World Cup after epic qualifying campaign - The Guardian - April 5th, 2026 [April 5th, 2026]
- Middle East Conflict: Tensions spill over to Iraq, with residential areas and public infrastructure hit by drone attacks - news.cgtn.com - April 5th, 2026 [April 5th, 2026]
- Iraq shuts key trade crossing with southern Iran after airstrikes near border post - The Times of Israel - April 5th, 2026 [April 5th, 2026]
- Iraq closes southern border crossing with Iran following deadly strike - China Daily - Global Edition - April 5th, 2026 [April 5th, 2026]
- Ohio National Guard pilot killed in Iraq to be buried Friday - FOX19 | Cincinnati - April 5th, 2026 [April 5th, 2026]
- America is about to hand Iraq to Iran again - Washington Examiner - April 5th, 2026 [April 5th, 2026]
- Freelance journalist from southern Wisconsin kidnapped in Iraq - WKOW - April 5th, 2026 [April 5th, 2026]
- US Embassy in Iraq warns Americans to leave now as Middle East strikes intensify - The Hill - April 5th, 2026 [April 5th, 2026]
- Iran: Iraq to be exempt from any Hormuz restrictions - Breakingthenews.net - April 5th, 2026 [April 5th, 2026]
- Iraq weather update: Clear skies south, rain and thunder in the north - Iraqi News - April 5th, 2026 [April 5th, 2026]
- Iran eases transit restrictions for Iraq, but US-Iran ceasefire odds drop - cryptobriefing.com - April 5th, 2026 [April 5th, 2026]
- CAIR Calls for Release of Wisconsin Journalist Shelly Kittleson Kidnapped in Iraq - CAIR - April 5th, 2026 [April 5th, 2026]
- Iraq War pilots among military experts enabling first crewed moon mission in more than 50 years - Stars and Stripes - April 5th, 2026 [April 5th, 2026]
- Iraqi Resistance Fighter Carry 19 Anti-US Ops Across Iraq - WION - April 5th, 2026 [April 5th, 2026]
- Deadly airstrike shuts Iraq's Shalamcheh crossing with Iran - Trkiye Today - April 5th, 2026 [April 5th, 2026]
- Iraq's World Cup qualification 'one of the toughest jobs in the world' - Arnold - espn.com - March 30th, 2026 [March 30th, 2026]
- Alive or not? Mojtaba Khamenei resurfaces with message to Iraq after Trump claim - India Today - March 30th, 2026 [March 30th, 2026]
- Iraq one step from first World Cup in 40 years after overcoming travel problems - MSN - March 30th, 2026 [March 30th, 2026]
- Latest message purportedly from Irans new supreme leader thanks Iraq for war support - The Times of Israel - March 30th, 2026 [March 30th, 2026]
- Khamenei Commends Iraq for Standing with Iran in War Against US, Israel - Caspian Post - March 30th, 2026 [March 30th, 2026]
- Rene Meulensteen: Qualifying for a World Cup is an opportunity to change the perception of Iraq - The Athletic - The New York Times - March 30th, 2026 [March 30th, 2026]
- Bolivias youthful reinvention takes them to brink of World Cup, but Iraq have cause to believe - The Athletic - The New York Times - March 30th, 2026 [March 30th, 2026]
- U.S. Policy in Iraq Deepens Its Crises Rather than Resolving Them - Middle East Forum - March 30th, 2026 [March 30th, 2026]
- The Long Shadow of the Iran-Iraq War - newlinesmag.com - March 30th, 2026 [March 30th, 2026]
- Iranians at the border crossing into Iraq urge the US to end the war - The Lufkin Daily News - March 30th, 2026 [March 30th, 2026]
- U.S. Tells Citizens to Leave Iraq After Second Attack on Embassy - The New York Times - March 30th, 2026 [March 30th, 2026]
- Sister recounts relentless fight to free sibling held captive in Iraq for 903 days - CBS News - March 30th, 2026 [March 30th, 2026]
- AP reports: Iranians at border crossing into Iraq urge US to end the war - Yahoo - March 30th, 2026 [March 30th, 2026]
- Mojtaba Khamenei Breaks Silence After Trump Question His Absence; Thanks Iraq For Supporting In War - The Times of India - March 30th, 2026 [March 30th, 2026]
- Three Ohio airmen killed in crash over Iraq to be returned to Columbus - WLWT - March 30th, 2026 [March 30th, 2026]
- Irans IRGC threatens to strike American universities in Iraq - Iraqi News - March 30th, 2026 [March 30th, 2026]
- Excavations at Alexander the Great's rediscovered city in Iraq postponed due to war - The Art Newspaper - March 30th, 2026 [March 30th, 2026]
- Exiled Iranian Kurds in Iraq say they will return only if Iran's theocracy falls - PBS - March 22nd, 2026 [March 22nd, 2026]
- Nato relocates personnel from Iraq mission to Europe amid conflict in Middle East as it happened - The Guardian - March 22nd, 2026 [March 22nd, 2026]
- Kurds in northern Iraq celebrate the new year festival of Nowruz, in photos - AP News - March 22nd, 2026 [March 22nd, 2026]
- Irans proxy militias in Iraq blast open a new front in war against US - The Jerusalem Post - March 22nd, 2026 [March 22nd, 2026]
- From the archives: Airmen at Bashur Airfield, Iraq - Stars and Stripes - March 22nd, 2026 [March 22nd, 2026]
- A Look Back at the U.S.-led Invasion of Iraq, 23 Years On - PBS - March 22nd, 2026 [March 22nd, 2026]
- NATO says it is 'adjusting' mission in Iraq after report of withdrawal of personnel - Reuters - March 22nd, 2026 [March 22nd, 2026]
- Iraq declares force majeure on foreign-operated oil fields over Hormuz disruption, sources say - Middle East Eye - March 22nd, 2026 [March 22nd, 2026]
- Fire reported after attack near US military base in northern Iraq - Anadolu Ajans - March 22nd, 2026 [March 22nd, 2026]
- Iraq's Kataib Hezbollah says it will temporarily suspend attacks on US embassy with conditions - Reuters - March 22nd, 2026 [March 22nd, 2026]
- Father of 3 deployed less than week among 6 airmen killed in plane crash in Iraq - NBC 6 South Florida - March 22nd, 2026 [March 22nd, 2026]
- Iraq Unable to Control Armed Militias, Kurdish Official Warns, Citing Hundreds of Attacks - Kurdistan24 - March 22nd, 2026 [March 22nd, 2026]
- Dollar steady in Iraq as Eid holiday halts trading - - March 22nd, 2026 [March 22nd, 2026]
- Iraq says investigations ongoing over attacks on diplomatic missions - thenewregion.com - March 22nd, 2026 [March 22nd, 2026]
- Trumps Iran War Already Costs More Than Bushs Iraq Opening - Newsweek - March 22nd, 2026 [March 22nd, 2026]
- Pentagon targets Iran-linked militias in Iraq as Hegseth vows 'we will finish this' for fallen US troops - Fox News - March 22nd, 2026 [March 22nd, 2026]
- Exiled Iranian Kurds in Iraq say they will return only if Irans theocracy falls - Los Angeles Times - March 22nd, 2026 [March 22nd, 2026]
- From the archives: Day 1 of the Iraq War - CBS News - March 22nd, 2026 [March 22nd, 2026]
- Post-Saddam Iraq at 23: The War It Never Wanted Is Back - Modern Diplomacy - March 22nd, 2026 [March 22nd, 2026]
- Kurds in northern Iraq celebrate the new year festival of Nowruz, in photos - Union-Bulletin - March 22nd, 2026 [March 22nd, 2026]
- On World Water Day 2026, know about the Mandaeans of Iraq and Iran and their aqua-centric faith - Down To Earth - March 22nd, 2026 [March 22nd, 2026]
- Iranian Kurdish fighters find themselves in the middle of U.S.-Iran war as they wait in Iraq - CBC - March 22nd, 2026 [March 22nd, 2026]
- Iranian Kurds long for home as they mark Nowruz in Iraq - AL-Monitor - March 22nd, 2026 [March 22nd, 2026]
- The 200 Spanish soldiers who remained in Iraq have been successfully evacuated - thediplomatinspain.com - March 22nd, 2026 [March 22nd, 2026]
- Exiled Iranian Kurds in Iraq say they will return only if Irans theocracy falls - AP News - March 22nd, 2026 [March 22nd, 2026]
- Same Lies, New War: Trump and the Iraq Playbook - Reason Magazine - March 22nd, 2026 [March 22nd, 2026]
- Pilot Honors Three Ohio Air National Guardsmen Killed in Refueling Tanker Crash in Iraq - The Weekly Times - March 22nd, 2026 [March 22nd, 2026]
- French jihadist sentenced to life in jail over IS group genocide of Iraq's Yazidis - France 24 - March 22nd, 2026 [March 22nd, 2026]
- Iraq Was the Warm-Up: Iran Is the Trap - RealClearDefense - March 22nd, 2026 [March 22nd, 2026]
- U.S. Embassy in Baghdad Targeted as Iraq Gets Drawn Deeper Into Regional War - The New York Times - March 9th, 2026 [March 9th, 2026]
- Beware the similarities between the wars in Iraq and Trumps Iran war - The Seattle Times - March 9th, 2026 [March 9th, 2026]
- From Iraq to Iran: How Congress Handed Over War Powers to the Presidency - Military.com - March 9th, 2026 [March 9th, 2026]
- The U.S. Embassy in Baghdad was targeted in a rocket attack over the weekend as Iraq found itself being drawn deeper into the war engulfing... - March 9th, 2026 [March 9th, 2026]
- Iraq coach Graham Arnold urges FIFA to delay his team's World Cup playoff because of the Iran war - NBC 6 South Florida - March 9th, 2026 [March 9th, 2026]
- Action on Another Front: Strikes on Pro-Tehran Militias in Iraq - Foundation for Defense of Democracies - March 9th, 2026 [March 9th, 2026]
- Oil and gas production shutdowns in Iraq and Kuwait widen the Iran war's impact on energy prices - Fortune - March 9th, 2026 [March 9th, 2026]
- Opinion | Trumps Iran War and the Shadow of Iraq - The New York Times - March 9th, 2026 [March 9th, 2026]
- Iraq coach Graham Arnold urges FIFA to delay his team's World Cup playoff because of the Iran war - Temple Daily Telegram - March 9th, 2026 [March 9th, 2026]