A pandemic accelerates the development of disparities between countries

 "The Black Death, a pandemic caused by the bacterium Yersinia pestis that spread across Asia, Africa and Europe beginning in 1346, was “without question the most catastrophic health crisis in recorded history,” Mark Bailey, a historian and the author of “After the Black Death: Economy, Society, and the Law in Fourteenth-Century England,” said in an interview. In England, it killed around 50 percent of the population in 1348 and 1349; in Europe as a whole, estimates range from 30 to 60 percent. The sheer scale of mortality was an enormous shock, though its effects went far beyond that. As Monica Green, a historian of medicine who specializes in medieval Europe, put it, “Who will bring in the harvest if half the people are gone?”

Different societies responded in different ways. In many parts of northwestern Europe, such as Britain and what is now the Netherlands, the sudden death of a huge share of working people meant it was easier for the survivors to get work and acquire land. “You get an increase in wealth per head and a reduction in wealth inequality,” Mr. Bailey explained. Economically, at least, “ordinary people are better off.”

The reverse was true in much of eastern Europe, where lords consolidated their power over the now-scarce peasantry to reimpose serfdom, forcing them to work the land on terms favorable to landowners. There, inequality flatlined or actually increased in the wake of the plague. 

There are many competing explanations for the split, but one possibility is that “the Black Death tends to accelerate existing trends,” like a movement toward a less feudal, more consumer-based economy in northern Europe, Mr. Bailey said. But that region didn’t magically become a bastion of equality post-plague — the English government imposed wage caps in the mid-14th century to keep pay from going too high. The result was widespread unrest, culminating in the Peasants’ Revolt of 1381, which brought together people of a wide variety of social backgrounds in an expression of “pent-up frustration” at government mismanagement of the economy, Mr. Bailey said.
Over all, if “resilience in a pandemic is coping,” he continued, “economic and social resilience subsequently is adapting.” The modern lesson: “Adapting to the new reality, the new paradigm, the new opportunities, is key.”"