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personc. 460-370 BC

Democritus

Summary

Ancient Greek philosopher from Abdera who, together with his teacher Leucippus, developed the first systematic atomist theory: the idea that all matter consists of indivisible particles (atoms) moving through void.

Core Contribution

Articulated philosophical atomism — the foundation of materialist metaphysics — and applied it to cosmology, perception, and ethics, arguing that happiness (euthymia) arises from inner balance.

Key Spikes & Highlights

  • Rediscovery via Epicurean texts (Renaissance)
  • Atomic theory parallels noted in 19th-20th century science

Notable Works & Achievements

On the Nature of the Cosmos

On the Mind

On Ethics

Collected Fragments

Historical Influences

Leucippus Anaxagoras Heraclitus

Intellectual Lineage

No conceptual lineage found.

Contemporaries & Peers

Socrates Protagoras Hippocrates

Minds Influenced

Epicurus Lucretius Epicurean ethics Early modern corpuscular philosophy

Intellectual Posterity

No conceptual posterity found.

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Democritus

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