c. 1,800 BCE
Science
Babylonia
Babylonian mathematics
Base-60 positional arithmetic, quadratic solutions and Pythagorean triples on clay tablets.
Why it mattered
Abstract mathematics separated from immediate accounting needs.
Bronze Age
1,800 BCE
2 recorded milestones at this point in the record.
c. 1,800 BCE
Warfare
Central Asia
Chariot warfare of the steppe
Sintashta cultures paired spoked wheels with trained horse teams.
Why it mattered
Transformed the speed and reach of Bronze Age armies.
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Nearby in the record
c. 2,000 BCEWarfare
Spoked wheel and chariot
Central Asia
c. 2,000 BCEArt & Culture
Enheduanna, the first named author
Mesopotamia
c. 1,900 BCEScience
Plimpton 322 and Babylonian triples
Mesopotamia
1,754 BCESociety
Code of Hammurabi
Babylonia
1,650 BCEScience
Rhind Mathematical Papyrus
Egypt
c. 1,600 BCECommunication
Alphabetic writing
Sinai and Levant