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
- 'I left for the Iraq war days after birth of son' - BBC - February 22nd, 2026 [February 22nd, 2026]
- US air power buildup in Middle East is largest since 2003 Iraq invasion report - The Times of Israel - February 22nd, 2026 [February 22nd, 2026]
- Iraq bloc may drop Maliki from PM nomination after US threats - The New Arab - February 22nd, 2026 [February 22nd, 2026]
- Trump considered giving himself highest military award for three-hour Iraq visit - The Independent - February 22nd, 2026 [February 22nd, 2026]
- Arnold: Iraq will shock the world - FIFA - February 22nd, 2026 [February 22nd, 2026]
- U.S. Gathers the Most Air Power in the Mideast Since the 2003 Iraq Invasion - The Wall Street Journal - February 22nd, 2026 [February 22nd, 2026]
- Iraq approves 'amicable settlement' with Russia's Lukoil over transfer of operations of giant field - Reuters - February 22nd, 2026 [February 22nd, 2026]
- Germany moves troops out of Iraq, citing Mideast tensions - The Times of Israel - February 22nd, 2026 [February 22nd, 2026]
- Trump Says He Deserves the Congressional Medal of Honor for His 2018 Visit to Iraq: 'I Was Extremely Brave' - People.com - February 22nd, 2026 [February 22nd, 2026]
- Rights group condemns US transfer of detainees with ISIS affiliation to Iraq - Jurist.org - February 22nd, 2026 [February 22nd, 2026]
- Iraq transfers ISIS prisoners from Syria, plans to return them to their homelands - ANHA - February 22nd, 2026 [February 22nd, 2026]
- Connecticut National Guard members deploying to Iraq and Kuwait - WFSB - February 22nd, 2026 [February 22nd, 2026]
- Celebrating 25 Years of Wikipedia and 10 Years of Wikimedia Iraq in Baghdad - Wikimedia.org - February 22nd, 2026 [February 22nd, 2026]
- Iraq Deposits Maritime Boundary Map with the UN to Strengthen Legal Position - OANANews - February 22nd, 2026 [February 22nd, 2026]
- US pushes to end NATO mission in Iraq in strategic shift under Trump - middle-east-online.com - February 22nd, 2026 [February 22nd, 2026]
- Germany pulls troops from northern Iraq amid rising Middle East tensions - TRT World - February 22nd, 2026 [February 22nd, 2026]
- Germany moves troops out of Iraq, citing Mideast tensions - arabnews.jp - February 22nd, 2026 [February 22nd, 2026]
- Trump says he considered awarding himself Medal of Honor for 2018 Iraq visit - Anadolu Ajans - February 22nd, 2026 [February 22nd, 2026]
- I have seen what the Mullahs regime has exported to Iraq, and that has made my country what it is todayIraqi Activist Sarah Idan - The European... - February 22nd, 2026 [February 22nd, 2026]
- HRW warns of risk of abuse after ISIS detainees transfer to Iraq - The New Arab - February 22nd, 2026 [February 22nd, 2026]
- Belgium gives 1.35 million to UN mine clearance in Iraq and Syria - belganewsagency.eu - February 22nd, 2026 [February 22nd, 2026]
- U.S. military says controversial transfer of thousands of ISIS suspects from Syria to Iraq complete - CBS News - February 16th, 2026 [February 16th, 2026]
- U.S. Transfers Thousands of ISIS Prisoners to Iraq From Syria - The New York Times - February 16th, 2026 [February 16th, 2026]
- David Petraeus, the U.S. general who oversaw the transition in Iraq: In Venezuela there will be innumerable mini-crises - EL PAS English - February 16th, 2026 [February 16th, 2026]
- Prospects And Risks Of A U.S. Troop Withdrawal From Syria And Iraq - Forbes - February 16th, 2026 [February 16th, 2026]
- In Iraq, Trump Achieves in a Tweet What It Took Bush an Army to Do - Middle East Forum - February 16th, 2026 [February 16th, 2026]
- No exit in sight: Why Turkey is keeping troops in Syria and Iraq - The New Arab - February 16th, 2026 [February 16th, 2026]
- IS suspects transferred from Syria to Iraq are interrogated in a Baghdad prison - AP News - February 16th, 2026 [February 16th, 2026]
- Iraq taps UAE expertise to boost local automotive industry - middle-east-online.com - February 16th, 2026 [February 16th, 2026]
- Iraq boosts US Treasury holdings to $40.8B in Dec. 2025 - - February 16th, 2026 [February 16th, 2026]
- Iraq to reopen key crossings with Syria - The New Region - February 16th, 2026 [February 16th, 2026]
- 5,000 Islamic State detainees transferred to Iraq from Syria, will face investigations - Foundation for Defense of Democracies - February 16th, 2026 [February 16th, 2026]
- What the 1991 uprising in Iraq can teach US and Iran - - February 16th, 2026 [February 16th, 2026]
- Reel Thoughts: The Presidents Cake offers a raw perspective on dictatorship in Iraq under Saddam Hussein - The Daily Northwestern - February 16th, 2026 [February 16th, 2026]
- A Legal Black Hole: Does Iraq Have the Right to Detain Prisoners Transferred from Syria? - Just Security - February 16th, 2026 [February 16th, 2026]
- Iraq seeks repatriation of transferred ISIS detainees to their home countries - The Arab Weekly - February 16th, 2026 [February 16th, 2026]
- US military says it completed Syria mission to transfer ISIS members to Iraq - Reuters - February 16th, 2026 [February 16th, 2026]
- PM: Iraq Bears Significant Security Responsibilities On Behalf Of The International Community - OANANews - February 16th, 2026 [February 16th, 2026]
- Iraq Weather Forecast: Stable conditions with cooler mornings and light rain chances - Iraqi News - February 16th, 2026 [February 16th, 2026]
- Erdoan, Iraqi PM Al Sudani discuss boosting Trkiye-Iraq ties | Daily Sabah - Daily Sabah - February 16th, 2026 [February 16th, 2026]
- Iraq says over 4,500 Daesh members transferred from Syria in coordination with US-led coalition - TRT World - February 16th, 2026 [February 16th, 2026]
- The Presidents Cake film review sadly charming tale of life in Iraq under Saddam and sanctions - Financial Times - February 16th, 2026 [February 16th, 2026]
- U.S. moving 7,000 ISIS suspects from Syria to Iraq amid concerns over security and due legal process - cbsnews.com - February 7th, 2026 [February 7th, 2026]
- Fragile Trump cannot see that Iran will make the Iraq War look like child's play - The i Paper - February 7th, 2026 [February 7th, 2026]
- Opportunity and Uncertainty in the Middle East: Next Steps for the Kurdistan Region of Iraq - Hudson Institute - February 7th, 2026 [February 7th, 2026]
- Explosion reported near US diplomatic facility in Iraq - Mehr News Agency - February 7th, 2026 [February 7th, 2026]
- US delivers new warning to Iraq over Maliki, threatens punitive measures - middle-east-online.com - February 7th, 2026 [February 7th, 2026]
- Iraq says received 2,250 terrorists from Syria - The New Region - February 7th, 2026 [February 7th, 2026]
- In Iraq, the Potential Return of a Divisive Leader Raises Alarm - Stratfor - February 7th, 2026 [February 7th, 2026]
- In the media: Letta Tayler on the mass transfer of IS detainees from Syria to Iraq - International Centre for Counter-Terrorism - ICCT - February 7th, 2026 [February 7th, 2026]
- Authorities warn of growing ISIS activities in western Iraq - rudaw.net - February 7th, 2026 [February 7th, 2026]
- What U.S. history with Iraq's oil can tell us about what could happen in Venezuela - NPR - February 4th, 2026 [February 4th, 2026]
- Iraq's Maliki says he would welcome decision to replace him as PM candidate - Reuters - February 4th, 2026 [February 4th, 2026]
- Archaeologists identify forgotten city of Alexandria on the Tigris in southern Iraq - Archaeology News Online Magazine - February 4th, 2026 [February 4th, 2026]
- Mohammed bin Issa Al Jabers Unprofitable Stand: Principle, Power, and Postwar Iraq - The Times of Israel - February 4th, 2026 [February 4th, 2026]
- Shock, awe, death, joy and looting: how the Guardian covered the outbreak of the Iraq war - The Guardian - February 4th, 2026 [February 4th, 2026]
- Nuri al-Maliki Is the Last Thing Iraq Needs - The National Interest - February 4th, 2026 [February 4th, 2026]
- IRGC Threatens To Strike Bases Housing U.S. Forces In Jordan, Iraq, Bahrain, And The UAE If They Take Part In U.S. Strike Against Iran - MEMRI |... - February 4th, 2026 [February 4th, 2026]
- Wary of regimes spies, Iranians along Iraq border speak out - CBC - February 4th, 2026 [February 4th, 2026]
- US reiterates opposition to Maliki as Iraq PM, ready to use full range of tools: Official - rudaw.net - February 4th, 2026 [February 4th, 2026]
- Iraq wins two golds and a silver at West Asia Paralympic Games - Iraqi News - February 4th, 2026 [February 4th, 2026]
- Iraq is moving to prevent the return of ISIS in a new form - thenationalnews.com - February 4th, 2026 [February 4th, 2026]
- Kurdistan's New Gas Play Just Exposed the Real Battle for Iraq - Crude Oil Prices Today | OilPrice.com - February 4th, 2026 [February 4th, 2026]
- Washington Threatens Iraq Over Independent Leadership - - February 4th, 2026 [February 4th, 2026]
- Christian Communities In Iraq Fear Resurgence Of ISIS-Linked Violence - Eurasia Review - February 4th, 2026 [February 4th, 2026]
- Iran defends Maliki amid fears of losing influence in Iraq - middle-east-online.com - February 4th, 2026 [February 4th, 2026]
- Youth Participate in Transformative Ziyarah Journey to Iraq in Partnership with the Imam Hussain Holy Shrine - Imam Mahdi Association of Marjaeya - January 24th, 2026 [January 24th, 2026]
- Europeans among 150 high-ranking IS members transferred to Iraq - Naharnet - January 24th, 2026 [January 24th, 2026]
- Singapore Airlines, Scoot avoiding airspace over Iraq, Red Sea amid US-Iran tensions - Yahoo News Singapore - January 24th, 2026 [January 24th, 2026]
- US threatened to block Iraq from its Federal Reserve deposits over Iran-aligned politicians - middleeasteye.net - January 24th, 2026 [January 24th, 2026]
- US begins transfer of up to 7,000 IS group detainees from Syria to Iraq - France 24 - January 24th, 2026 [January 24th, 2026]
- Seeking to limit Irans influence, US threatens to starve Iraq of its oil dollars - thearabweekly.com - January 24th, 2026 [January 24th, 2026]
- Iraq expects $25 million annual cost to feed ISIS detainees - Iraqi News - January 24th, 2026 [January 24th, 2026]
- Will Transfer of ISIS Detainees Open Flood Gates to Terrorism in Iraq? - themedialine.org - January 24th, 2026 [January 24th, 2026]
- China-Middle East Connectivity: Iraq, Egypt, and Oman - New Lines Institute - January 24th, 2026 [January 24th, 2026]
- The decision to move IS prisoners from Syria to Iraq came at the request of Baghdad, officials say - AP News - January 24th, 2026 [January 24th, 2026]
- Why the Kurdistan Region of Iraq Is Americas Energy Anchor in Post-War Syria - The National Interest - January 24th, 2026 [January 24th, 2026]
- The decision to move ISIS prisoners from Syria to Iraq came at the request of Baghdad, officials say - inquirer.com - January 24th, 2026 [January 24th, 2026]
- US warned Iraq of oil sanctions, freezing ties over Iran ties - Reuters - - January 24th, 2026 [January 24th, 2026]
- U.S. WARNS IRAQ: DITCH IRAN TIES OR OR ELSE! U.S. officials straight-up told Iraqi bigwigs that if Baghdad keeps cozying up economically with Iran,... - January 24th, 2026 [January 24th, 2026]