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History by Century
26 defining moments, one per century from ancient times to today.
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Ancient
Medieval
Early Modern
Modern
Contemporary
Ancient
10 events
0/10 learned
6th century BCE
528 BCE
Buddha attains enlightenment
India
Siddhartha Gautama's teachings under the Bodhi Tree founded Buddhism — now 500 million followers. He rejected both extreme asceticism and luxury, proposing a 'Middle Way' that remains radical.
5th century BCE
508 BCE
Athens invents democracy
Greece
Cleisthenes introduced a system where all free male citizens voted directly on laws. The concept was so unprecedented it had no word in any other language — 'democracy' is Greek.
4th century BCE
334 BCE
Alexander the Great conquers Persia
Macedonia
In 13 years, Alexander built the largest empire the world had yet seen — spreading Greek language and culture from Egypt to the borders of India. He was 32 when he died, his empire undefeated.
3rd century BCE
221 BCE
Qin Shi Huang unifies China
China
China's first emperor standardized script, currency, and measurements across a continent — creating a unified state that has lasted, in various forms, for 2,200 years.
2nd century BCE
146 BCE
Rome destroys Carthage
Rome
Rome salted the earth of Carthage and sold its 50,000 survivors into slavery — eliminating its only rival in the western Mediterranean and beginning unchallenged Roman dominance.
1st century BCE
44 BCE
Julius Caesar assassinated
Rome
23 senators stabbed Caesar on the Ides of March, fearing he would make himself king. Their act backfired — it ended the Republic they were trying to save and led directly to the Roman Empire.
1st century CE
70 CE
Romans destroy the Temple in Jerusalem
Judea
Rome crushed the Jewish revolt and destroyed the Second Temple — the center of Jewish life. The diaspora that followed scattered Jewish communities across three continents for 2,000 years.
2nd century CE
117 CE
Roman Empire reaches its greatest extent
Rome
Under Emperor Trajan, Rome ruled from Scotland to Mesopotamia — 5 million square kilometers. One in five people alive on Earth was a Roman subject. It was the peak of ancient Western civilization.
4th century CE
313 CE
Constantine legalizes Christianity
Rome
The Edict of Milan transformed Christianity from a persecuted sect into the religion of the most powerful empire in the world — reshaping 2,000 years of Western history.
5th century CE
476 CE
Fall of the Western Roman Empire
Rome
When the last emperor Romulus Augustulus was deposed by a Germanic chieftain, it ended 1,200 years of Roman rule in the West. Historians still debate whether Rome 'fell' or slowly transformed.
Medieval
6 events
0/6 learned
7th century CE
610 CE
Muhammad receives his first revelation
Arabia
The Angel Gabriel's words to Muhammad in a cave near Mecca began a religion that would reach 2 billion followers. Within 100 years of his death, Islam had spread from Spain to Central Asia.
8th century CE
732 CE
Battle of Tours stops Islamic advance into Europe
France
Charles Martel halted the Muslim army that had swept through Spain. Historians debate whether this battle truly 'saved' Christian Europe — but it marked the furthest Islamic military penetration into Western Europe.
9th century CE
793 CE
Viking Age begins
Scandinavia
The raid on Lindisfarne monastery announced a new force in European history. Vikings would go on to settle Iceland, Greenland, North America, and found the cities of Dublin, Kyiv, and Normandy.
13th century CE
1206 CE
Genghis Khan launches the Mongol conquests
Mongolia
Born into slavery, Temujin united the Mongol tribes and launched conquests that would kill 40 million people and create the largest land empire in history — connecting Europe and China for the first time.
14th century CE
1347 CE
Black Death devastates Europe
Europe
The plague killed one-third of Europe's population in five years — upending feudalism, empowering survivors with higher wages, and accelerating social change that helped spark the Renaissance.
15th century CE
1453 CE
Fall of Constantinople
Ottoman Empire
The Ottoman conquest ended the 1,100-year Byzantine Empire, cut off the Silk Road to Europe, and forced European powers to seek sea routes to Asia — directly triggering the Age of Exploration.
Early Modern
3 events
0/3 learned
15th century CE
1492 CE
Columbus reaches the Americas
Spain
Columbus died believing he had reached Asia. His voyages triggered the Columbian Exchange — the largest transfer of plants, animals, and diseases in history, reshaping populations on every continent.
16th century CE
1517 CE
Martin Luther sparks the Protestant Reformation
Germany
Luther's 95 Theses — nailed to a church door or perhaps just mailed — fractured Western Christianity. The religious wars that followed killed millions and reshaped the map of Europe.
17th century CE
1687 CE
Newton publishes Principia Mathematica
England
Newton's laws of motion and universal gravitation explained how planets orbit, how tides work, and why objects fall — creating the framework for all of modern physics and engineering.
Modern
4 events
0/4 learned
18th century CE
1776 CE
American and French Revolutions
Americas / Europe
Two revolutions within 13 years overthrew monarchy and aristocracy as the default form of government, establishing democracy and human rights as ideals that would eventually spread worldwide.
19th century CE
1859 CE
Darwin publishes On the Origin of Species
England
Evolution by natural selection offered a scientific explanation for life's diversity without a creator — the most consequential idea in biology and one of the most contested in human history.
20th century CE
1914 CE
World War I begins
Europe
The assassination of Archduke Franz Ferdinand triggered a cascade of alliances into the first industrialized world war — 20 million dead, empires dissolved, and conditions set for an even deadlier sequel.
20th century CE
1945 CE
Atomic bombs dropped on Japan
USA / Japan
The Manhattan Project's weapons killed 200,000 people and ended WWII — but also began the nuclear age, in which human civilization acquired the ability to destroy itself for the first time.
Contemporary
3 events
0/3 learned
20th century CE
1969 CE
Moon landing
USA
Apollo 11 carried humanity off its home planet for the first time. Armstrong's 'one small step' was watched by 600 million people — a third of all humans alive — in the largest shared moment in television history.
20th century CE
1989 CE
Fall of the Berlin Wall
Germany
The wall's fall symbolized the end of the Cold War that had defined global politics for 45 years. Within two years, the Soviet Union — which had split the atom, launched the first satellite, and threatened nuclear war — ceased to exist.
21st century CE
2001 CE
September 11 attacks
USA
Nearly 3,000 deaths triggered two decades of global war on terror, mass surveillance, and seismic shifts in geopolitics, immigration, and civil liberties that continue reshaping the world today.