John Mearsheimer on The Mother of All Strategic Blunders

by | Sep 1, 2026 | News | 5 comments

Reprinted from John’s Substack

On 28 August 2026, I was on “The Chris Hedges Report” talking mainly about the ongoing disaster in Iran. Chris was interested in pushing me to explain why I believe the Iran war is the greatest strategic blunder in US history. Of course, that is really saying something when you realize it has at least two serious competitors that took place during Chris’s and my lifetimes: the Vietnam and Iraq wars.

Iran is number one in my opinion, because 1) we went into that war based on the false claim that Iran was on the verge of acquiring a nuclear weapon; 2) we had a theory of victory — air power alone would produce regime change — that has never worked and was not going to work this time; 3) we had no contingency plan for dealing with the likelihood that Iran would close the Strait of Hormuz; 4) we failed to achieve any of our four principal objectives — regime change, ending Iran’s nuclear enrichment capability, ending Iran’s long-range missile capability, and ending Iran’s support for Hamas, Hezbollah, and the Houthis; 5) the Strait was closed, which has already done significant damage to the international economy and could do much more — remember President Trump worries about following in Herbert Hoover’s footsteps; 6) we seriously undermined our carefully crafted alliance structure in the Gulf; 7) virtually all of our bases in the region have either been badly damaged or destroyed, to the point where we have moved most of our military assets out of the Gulf region and will probably not be able to return; 8) we have run down our stocks of key weapons to the point where we have weakened our deterrent postures in East Asia, Europe, and even the Western Hemisphere; 9) we have done enormous damage to our reputation as a reliable and wise ally; 10) we have markedly improved Iran’s strategic position in the Gulf region; and 11) there does not appear to be much chance — perhaps no chance — that we will get a nuclear deal of any sort with Iran, which was once considered of the utmost importance. In fact, there is a reasonable chance Iran will acquire nuclear weapons. President Trump has certainly given Iranian leaders — and other leaders of non-nuclear states around the world — a powerful incentive to acquire a nuclear deterrent.

It is difficult to imagine a more stunning strategic failure.

John J. Mearsheimer, PhD, is an American professor of Political Science at the University of Chicago. More recently Mearsheimer has attracted attention for co-authoring and publishing the article The Israel Lobby and U.S. Foreign Policy, which was subsequently published as a book.

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