Pandemic1346 CE – 1353 CEEurope, Asia, Middle East, Africa

Black Death

The bubonic plague pandemic devastated Eurasia and North Africa, killing an estimated 75–200 million people — roughly 30–60% of Europe's population — and fundamentally altering medieval society.

Key Figures
Pope Clement VIGiovanni BoccaccioIbn Battuta

Preceding Causes

Yersinia pestis bacteria, likely spread via fleas on rodents, traveling along Mongol-era trade routes from Central Asia. The bacterium reached Europe via Genoese trading ships from the besieged port of Caffa in Crimea.

Empire1206 CE

Mongol Conquests

Genghis Khan unified the Mongol tribes and launched conquests that created the largest contiguous land empire in history, stretching from the Pacific to Eastern Europe.

Historical Consequences

Collapsed feudal labor systems as surviving peasants could demand higher wages, accelerated peasant uprisings across Europe, weakened the Catholic Church's moral authority, and contributed to conditions that enabled the Renaissance through labor scarcity and wealth redistribution.

Revolution1517 CE

Protestant Reformation

Martin Luther's Ninety-Five Theses (1517) challenged Catholic Church authority over indulgences, sparking a religious upheaval that permanently divided Western Christianity into Catholic and Protestant branches.

Cause-Effect Graph

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