Who would you believe about Russian strongman Vladimir Putin’s intentions: a distinguished American political scientist or an equally distinguished Russian sociologist? The American political scientist is John Mearsheimer of the University of Chicago. The Russian sociologist is Grigory Yudin of the Higher School of Economics and the Moscow School for the Social and Economic Sciences. Mearsheimer is known for having argued consistently that NATO enlargement was primarily responsible for deteriorating the West’s relations with Russia and, ultimately, producing the Russo-Ukrainian War. Yudin puts the blame squarely on Putin, arguing two days before the Russian invasion that Putin was “about to...