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John Mearsheimer: Russia & Iran – The West’s Escalation Trap (Transcript)

Read the full transcript of political scientist John Mearsheimer’s interview: “Russia & Iran – The West’s Escalation Trap” on Greater Eurasia Podcast, August 28, 2026.

EDITOR’S NOTE: In this timely conversation with host Glenn Diesen, University of Chicago political scientist John Mearsheimer examines what he calls the West’s “escalation trap” involving Russia and Iran. The two discuss talk of tactical nuclear weapons, NATO strikes deep inside Russia, the war in Gaza, and economic seizures, arguing that leftover unipolar-era thinking is colliding with a more multipolar world and raising the risk of a dangerous security dilemma.

The Shift from Unipolarity to Multipolarity

GLENN DIESEN (00:00:01 – 00:01:46): Welcome back, everyone. We are joined today by Professor John Mearsheimer. Thank you very much for coming on the program. I’ve been looking forward to ask you about these unprecedented escalations we’re seeing. That is, the willingness, the effectiveness, as well as the consequences of these escalations, which in my opinion hasn’t really been discussed enough.

Case in point, in the war against Iran, we hear now talks about the possibility of, I guess, widening the options by also using tactical nuclear weapons against Iran. Against Russia, we see now remarkable openness about the strategy of several NATO countries to strike deep inside Russia to hit civilian targets, as the Finnish president said. So they would put pressure on the Kremlin.

And of course, you can look at Gaza, which is, it just seems like there’s no limits anymore to the willingness to escalate. And one can also look at economics, that is the United States is now discussing whether it should legalize the seizure of Iranian oil tankers and essentially make it US property. And all of this happens at the same time as the Europeans are discussing whether or not they should steal all the Russian sovereign funds to also pay for the war.

So there’s no rules anymore, it seems, and the old international system is dismantled. And before getting into effectiveness and consequences, I was wondering, how do you explain this era we’re living in now, the seemingly shedding all these constraints, rules? And possibly common sense.

JOHN MEARSHEIMER (00:01:47 – 00:10:00): Well, some of it just has to do with the fact that you have moved from a unipolar world to a multipolar world. I was born and raised, or I should say I came of age during the bipolar world. We had 2 great powers, the United States and the Soviet Union. It was a pretty simple world. You had the Soviets on one side and their order on that side. And then on the other side, you had the United States with its bounded order. So you had these 2 superpowers that were facing each other eyeball to eyeball, and each had its own order.

And then that bipolar world went away and you moved into a unipolar world where there was only one great power on the planet, and that one great power was the United States. And it took its order that was left over from the Cold War, that Western order that we had built during the Cold War, and it tried to extend it all across the globe. This is the liberal international order. The liberal international order basically was the Western order from the Cold War extended across the globe.

But then I argue roughly around 2017, unipolarity came to an end and you moved into a multipolar world. And you have now 3 great powers: China, Russia, and the United States. It’s just a fundamentally different world than existed during unipolarity. And it’s also a fundamentally different world than existed during bipolarity.

And what that means is that the order that existed during the unipolar moment is going to come to an end. That order, again, by almost all accounts that existed during the unipolar moment, was a liberal international order. And you could have a liberal international order when you had a liberal unipole. The only great power on the planet was the United States. It was a liberal state. But that world is gone.

You now have 3 great powers, and the Chinese have a fundamentally different view, and the Russians have a fundamentally different view of what the order or orders should look like. And just think about BRICS. BRICS is part of a newly emerging order. BRICS is designed to deal with the US-led order. Just think about the BRICS Bank and what the BRICS Bank would like to do compared to the IMF and the World Bank, which are dominated by the United States.

So what you see happening here is not all that surprising. You just have a new distribution of power in the system. You’re in a multipolar world, and that existing order from the Cold War is gone. It’s just gone. And the Chinese and the Russians are interested in establishing a different order. And the Americans want their own order. It’s a lot like the Cold War in that sense. So that tells you a lot about what’s going on.

But then just put aside the order for a moment and just focus on the 3 great powers in the system. What you have here is a system that’s just much more complicated than the bipolar world of the Cold War. When I got up every day during the Cold War and read the newspapers, it was much easier to keep track of what was going on than it is to keep track of what’s going on today. Because you have 3 great powers instead of 1 great power, which you had during unipolarity, and even 2 great powers, which you had during bipolarity. And those 3 great powers are interacting in all sorts of ways that make it difficult to keep track of what’s going on.

And then when you factor in someone like Donald Trump, and you also factor in the consequences of what the United States did during the unipolar moment, you get a really complicated world.

Now, what exactly am I saying there?