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Great mortality

The Great Mortality is the massive death toll from the Black Death in mid-14th-century Europe. In European History 1000 to 1500, it marks a turning point in population, labor, and social order.

Last updated July 2026

What is the great mortality?

The Great Mortality is the name often used for the devastating wave of plague that hit Europe in the mid-1300s, especially between 1347 and 1351. It is the same catastrophe usually called the Black Death, and it killed roughly one-third of Europe’s population.

In this course, the term does more than label a disease outbreak. It marks a turning point in medieval European history, because the scale of death changed almost every part of daily life. Whole villages lost neighbors, families lost workers, and cities lost enough people to disrupt trade, worship, and local government.

The plague spread fast because medieval Europe was connected. Trade routes carried ships, goods, and people across the Mediterranean and into port cities, and the disease moved with them. Fleas on rats were a major means of transmission, so the problem was not only travel but also crowded living conditions and busy commercial centers.

People in the 1300s did not know about bacteria, so they tried to explain the disaster with the ideas they had. Many believed the plague was a punishment from God, while others blamed bad air, foreign strangers, or other superstitions. That fear mattered because it shaped behavior, from religious processions and penance to panic, scapegoating, and social mistrust.

The Great Mortality also changed the economy. With so many workers dead, labor became scarce. Survivors could ask for higher wages, move more freely, or push back against older feudal obligations. That does not mean feudalism disappeared overnight, but the plague weakened the old system by giving workers more bargaining power.

Culturally, the shock of mass death showed up in art, literature, and religious practice. Europeans became more focused on death, judgment, and the fragility of life. If you see a medieval source from this period mentioning fear, labor shortages, or religious anxiety, the Great Mortality is often the background that explains it.

Why the great mortality matters in European History – 1000 to 1500

The Great Mortality matters because it is one of the clearest examples of how a demographic crisis can transform a whole society. In European History 1000 to 1500, you use it to explain why the late medieval world did not stay stable after the High Middle Ages.

It connects population change to social change. Before the plague, many lords depended on large numbers of peasants and laborers tied to the land. After the plague, scarcity gave workers more leverage, which helps explain higher wages, peasant bargaining, and growing pressure on feudal obligations.

It also helps you interpret medieval fear and religious response. When a text, image, or class discussion mentions divine punishment, penitential movement, or intense death imagery, the Great Mortality is the historical context behind that mindset.

The term is useful for tracing cause and effect across multiple units. It links plague spread, trade, urban life, labor systems, and cultural expression in one event, which is exactly the kind of big-picture connection this period asks you to make.

Keep studying European History – 1000 to 1500 Unit 9

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How the great mortality connects across the course

Black Death

Black Death is the more common name for the same plague pandemic. If a source or question uses that term instead of Great Mortality, it is usually pointing to the same mid-14th-century catastrophe and its effects on Europe’s population, labor system, and religion.

Bubonic Plague

Bubonic Plague names the disease form associated with swollen lymph nodes and rapid spread through fleas and rats. Great Mortality focuses more on the historical event and its impact on Europe, while bubonic plague is the medical explanation behind the outbreak.

Social Upheaval

The Great Mortality fed social upheaval by shaking inherited roles and expectations. When millions died, communities faced labor shortages, fear, resentment, and unrest, so the plague becomes a starting point for explaining why medieval European society felt less controlled after 1350.

Miasma Theory

Miasma Theory is one of the wrong explanations people used for the plague. It connects to the Great Mortality because many medieval Europeans thought disease came from poisoned air, which shaped how they responded even though they did not understand the actual cause.

Is the great mortality on the European History – 1000 to 1500 exam?

A quiz item or short answer on the Great Mortality usually asks you to identify what happened, explain how it spread, or describe one major consequence. The safest move is to connect the outbreak to a specific change, like labor shortages, higher wages, fear of divine punishment, or pressure on feudalism.

If you get a passage, image, or timeline question, look for clues such as references to death, plague, crowded cities, trade routes, or religious panic. Then explain not just that people died, but how that death altered society. A strong response shows the chain: disease spread, population dropped, workers became scarce, and social relations shifted.

When comparing medieval developments, use the Great Mortality as a turning point between a more stable feudal economy and the more flexible, disrupted world that followed.

The great mortality vs Black Death

These terms are often used for the same plague outbreak, but Great Mortality is the term that emphasizes the massive death toll and historical impact, while Black Death is the more common name for the pandemic itself.

Key things to remember about the great mortality

  • The Great Mortality is the massive plague outbreak that killed about one-third of Europe in the mid-14th century.

  • It spread quickly along trade routes, which shows how connected medieval Europe already was.

  • The plague changed more than demographics, it disrupted labor, religion, and daily life across towns and countryside.

  • Survivors often blamed God, bad air, or other causes they could understand at the time, which shaped medieval reactions to the disaster.

  • The labor shortage after the plague gave many workers more bargaining power and helped weaken feudal structures.

Frequently asked questions about the great mortality

What is the Great Mortality in European History 1000 to 1500?

The Great Mortality is the huge death wave caused by the Black Death in mid-14th-century Europe. It killed roughly one-third of the population and became a major turning point in medieval European society. In this course, it is used to explain population loss, labor shortages, and cultural fear.

Is the Great Mortality the same as the Black Death?

Yes, in most history classes these terms point to the same plague pandemic. Great Mortality highlights the scale of death, while Black Death is the more familiar name for the disease outbreak. You may see either one in readings, and both connect to the same mid-1300s crisis.

How did the Great Mortality change feudalism?

It weakened feudalism by creating a labor shortage. With so many workers dead, peasants and laborers could ask for higher wages or better terms, and landowners had a harder time keeping old labor obligations in place. The system did not vanish immediately, but it came under serious pressure.

Why did people think the Great Mortality was punishment from God?

Medieval Europeans did not know about bacteria or flea transmission, so they looked for explanations in religion and superstition. Many saw the plague as divine punishment for sin, which led to prayers, processions, and other acts of repentance. That belief is a big part of how people emotionally experienced the disaster.

Great Mortality | European History 1000 to 1500 | Fiveable