by Andrew Latham, Consortium News:

Andrew Latham begins with the Antonine and Cyprian twin plagues, which ravaged the Roman Empire and gave rise to Christianity.

Before March of this year, few probably thought disease could be a significant driver of human history.

Not so anymore. People are beginning to understand that the little changes Covid-19 has already ushered in or accelerated – telemedicine, remote work, social distancing, the death of the handshake, online shopping, the virtual disappearance of cash and so on – have begun to change their way of life. They may not be sure whether these changes will outlive the pandemic. And they may be uncertain whether these changes are for good or ill.

Three previous plagues could yield some clues about the way Covid-19 might bend the arc of history. As I teach in my course “Plagues, Pandemics and Politics,” pandemics tend to shape human affairs in three ways.

First, they can profoundly alter a society’s fundamental worldview. Second, they can upend core economic structures. And, finally, they can sway power struggles among nations.

Sickness Spurs Rise of Christian West

The Antonine plague, and its twin, the Cyprian plague – both now widely thought to have been caused by a smallpox strain – ravaged the Roman Empire from A.D. 165 to 262. It’s been estimated that the combined pandemics’ mortality rate was anywhere from one-quarter to one-third of the empire’s population.

While staggering, the number of deaths tells only part of the story. This also triggered a profound transformation in the religious culture of the Roman Empire.

On the eve of the Antonine plague, the empire was pagan. The vast majority of the population worshipped multiple gods and spirits and believed that rivers, trees, fields and buildings each had their own spirit.

Christianity, a monotheistic religion that had little in common with paganism, had only 40,000 adherents, no more than 0.07 percent of the empire’s population.

Yet within a generation of the end of the Cyprian plague, Christianity had become the dominant religion in the empire.

How did these twin pandemics effect this profound religious transformation?

Rodney Stark, in his seminal work The Rise of Christianity, argues that these two pandemics made Christianity a much more attractive belief system.

While the disease was effectively incurable, rudimentary palliative care – the provision of food and water, for example – could spur recovery of those too weak to care for themselves. Motivated by Christian charity and an ethic of care for the sick – and enabled by the thick social and charitable networks around which the early church was organized – the empire’s Christian communities were willing and able to provide this sort of care.

Pagan Romans, on the other hand, opted instead either to flee outbreaks of the plague or to self-isolate in the hope of being spared infection.

This had two effects.

First, Christians survived the ravages of these plagues at higher rates than their pagan neighbors and developed higher levels of immunity more quickly. Seeing that many more of their Christian compatriots were surviving the plague – and attributing this either to divine favor or the benefits of the care being provided by Christians – many pagans were drawn to the Christian community and the belief system that underpinned it. At the same time, tending to sick pagans afforded Christians unprecedented opportunities to evangelize.

Second, Stark argues that, because these two plagues disproportionately affected young and pregnant women, the lower mortality rate among Christians translated into a higher birth rate.

The net effect of all this was that, in roughly the span of a century, an essentially pagan empire found itself well on its way to becoming a majority Christian one.

Plague of Justinian & Fall of Rome

The plague of Justinian, named after the Roman emperor who reigned from A.S. 527 to 565, arrived in the Roman Empire in A.D. 542 and didn’t disappear until A.D. 755. During its two centuries of recurrence, it killed an estimated 25 percent to 50 percent of the population – anywhere from 25 million to 100 million people.

This massive loss of lives crippled the economy, triggering a financial crisis that exhausted the state’s coffers and hobbled the empire’s once mighty military.

In the east, Rome’s principal geopolitical rival, Sassanid Persia, was also devastated by the plague and was therefore in no position to exploit the Roman Empire’s weakness. But the forces of the Islamic Rashidun Caliphate in Arabia – which had long been contained by the Romans and Sasanians – were largely unaffected by the plague. The reasons for this are not well understood, but they probably have to do with the caliphate’s relative isolation from major urban centers.

Caliph Abu Bakr didn’t let the opportunity go to waste. Seizing the moment, his forces swiftly conquered the entire Sasanian Empire while stripping the weakened Roman Empire of its territories in the Levant, the Caucasus, Egypt and North Africa.

Pre-pandemic, the Mediterranean world had been relatively unified by commerce, politics, religion and culture. What emerged was a fractured trio of civilizations jockeying for power and influence: an Islamic one in the eastern and southern Mediterranean basin; a Greek one in the northeastern Mediterranean; and a European one between the western Mediterranean and the North Sea.

This last civilization — what we now call medieval Europe — was defined by a new, distinctive economic system.

Before the plague, the European economy had been based on slavery. After the plague, the significantly diminished supply of slaves forced landowners to begin granting plots to nominally “free” laborers – serfs who worked the lord’s fields and, in return, received military protection and certain legal rights from the lord.

The seeds of feudalism were planted.

Black Death of the Middle Ages

The Black Death broke out in Europe in 1347 and subsequently killed between one-third and one-half of the total European population of 80 million people. But it killed more than people. By the time the pandemic had burned out by the early 1350s, a distinctly modern world emerged – one defined by free labor, technological innovation and a growing middle class.

Before the Yersinia pestis bacterium arrived in 1347, Western Europe was a feudal society that was overpopulated. Labor was cheap, serfs had little bargaining power, social mobility was stymied and there was little incentive to increase productivity.

But the loss of so much life shook up an ossified society.

Labor shortages gave peasants more bargaining power. In the agrarian economy, they also encouraged the widespread adoption of new and existing technologies – the iron plow, the three-field crop rotation system and fertilization with manure, all of which significantly increased productivity. Beyond the countryside, it resulted in the invention of time and labor-saving devices such as the printing press, water pumps for draining mines and gunpowder weapons.

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