An influential analysis of Russia’s aggression towards Ukraine suggests that it’s NATO’s overreach in the region that’s to blame. Russia is simply defending itself from being encircled by Western power. But, pay attention to what Putin is actually saying, and a very different explanation emerges. Putin thinks his destiny is to restore Russia to its former glory, writes Stathis Kalyvas.

In a widely viewed lecture he gave back in 2015 (it has garnered over ten million views), John J. Mearsheimer, a respected professor of International Relations at the University of Chicago and perhaps the best-known exponent of the so-called Realist school of thought, explained the crisis that broke out in the Ukraine the year before. In essence, he blamed Russia’s aggression in 2014 on the US and NATO overreach, an unneeded provocation against Russia. It was only natural for Russia to react the way it did, and the West had only itself to blame for prioritizing what Mearsheimer describes as frivolous “21^st century” ideas over his own solid “19^th century” ones. As for the Ukrainians, tough luck. In the hard world of great power politics, you can’t possibly seek closer integration with the West if you happen to live on Russia’s doorstep. “The strong do what they can and the weak suffer what they must,” is how Thucydides famously had the Athenians say and what Mearsheimer echoes.

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Mearsheimer observed: “If you really want to wreck Russia, what you should do is to encourage it to try to conquer Ukraine. Putin is much too smart to try that.”

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Mearsheimer’s lecture is referenced these days by those who wish to blame the West for Putin’s invasion of Ukraine. Yet, it also contains a remarkable passage. At two points, Mearsheimer observes that “if you really want to wreck Russia, what you should do is to encourage it to try to conquer Ukraine. Putin,” Mearsheimer adds, “is much too smart to try to do that.” In his telling, Russia could safely undermine Ukraine without having to invade it. Things turned even worse than this grim realist predicted. So why did this analysis prove so wrong, and how should we understand Putin instead?