Epicurus of Samos (341-270 BCE)
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The man who turned atoms into a cure for fear. Born in Samos, he taught in a garden outside Athens that scandalously admitted women and the enslaved as equal members. He took Democritus’s atomism and built whole ethics on it — and added the one thing Democritus’s universe lacked: the swerve.
The swerve idea example:
In Epicurus’s physics atoms fall through the void in parallel straight lines, all at the same speed — so on their own they would never meet. His fix was the clinamen, the swerve: now and then an atom deviates by an unpredictable minimum, just enough to collide and build worlds, and just enough to break the grip of fate and leave room for free will. Almost none of his own writing survived; we know his physics mainly through the Roman poet Lucretius, whose De Rerum Natura carried atomism through a single rediscovered manuscript to Gassendi and Newton. Epicurus is the reason the idea was still alive to be revived.