c. 400 BCE
Medicine
Greece
Hippocratic medicine
Disease framed as natural rather than divine, with observation and prognosis.
Why it mattered
The founding of medicine as an empirical discipline.
Antiquity
400 BCE
3 recorded milestones at this point in the record.
c. 400 BCE
Warfare
China
Crossbow in China
Bronze trigger mechanisms made the crossbow a mass-issued infantry weapon of the Warring States.
Why it mattered
Let conscripts outshoot lifelong archers, reshaping Chinese armies.
c. 400 BCE
Science
China
Mohist logic and siege defence
Chinese Mohists combined formal argument with practical fortification engineering.
Why it mattered
An early union of philosophy and engineering.
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