Peter Turchin, one of the world’s experts on pine beetles and possibly also on human beings, met me reluctantly this summer on the campus of the University of Connecticut at Storrs, where he teaches. Like many people during the pandemic, he preferred to limit his human contact. He also doubted whether human contact would have much value anyway, when his mathematical models could already tell me everything I needed to know.
But he had to leave his office sometime. (“One way you know I am Russian is that I cannot think sitting down,” he told me. “I have to go for a walk.”) Neither of us had seen much of anyone since the pandemic had closed the country several months before. The campus was quiet. “A week ago, it was even more like a neutron bomb hit,” Turchin said. Animals were timidly reclaiming the campus, he said: squirrels, woodchucks, deer, even an occasional red-tailed hawk. During our walk, groundskeepers and a few kids on skateboards were the only other representatives of the human population in sight.
The year 2020 has been kind to Turchin, for many of the same reasons it has been hell for the rest of us. Cities on fire, elected leaders endorsing violence, homicides surging—to a normal American, these are apocalyptic signs. To Turchin, they indicate that his models, which incorporate thousands of years