For roughly 290,000–300,000 years, anatomically modern humans never built cities. Then, within a few thousand years, Uruk swelled in Mesopotamia, Harappa and Mohenjo-Daro rose in the Indus Valley with grid streets, walled settlements appeared along China's Yellow River, and Norte Chico's platform mounds emerged on Peru's coast — all without contact. What shifted? 🏛️
Early civilizations emerged independently in a narrow time window across the globe
Key facts
- For roughly 290,000-300,000 years, anatomically modern humans did not build cities.
- Agriculture begins around the equivalent of December 29th and first cities around December 30th in a compressed calendar-year analogy.
- Uruk swelled to tens of thousands of people in Mesopotamia between the Tigris and Euphrates.
- Harappa and Mohenjo-Daro appeared in the Indus Valley with grid-planned streets and standardized brick ratios.
- Walled settlements rose along the Yellow River in northern China.
- Norte Chico on Peru's desert coast featured monumental platform mounds and pyramids.
- These civilizations had no contact with each other yet arose within a few thousand years of each other.
Sources
worldhistory.org
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preparationinfo.org
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nature.com
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One of the earliest settlements in the Fertile Crescent is Göbekli Tepe. It is in northern Mesopotamia, present-day Turkey, and was constructed ...
Uruk: The First Citymetmuseum.org
By around 3200 B.C., the largest settlement in southern Mesopotamia, if not the world, was Uruk: a true city dominated by monumental mud-brick ...
Uruk: The First Great Cityworldhistory.org
Uruk was founded c. 5000/4500 BCE. · Uruk is most famous as the city of the king Gilgamesh, but also for a number of cultural developments, ...
Uruken.wikipedia.org
Uruk, the archeological site known today as Warka, was an ancient city in the Near East or West Asia, At its peak around 3100 BC,
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