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Portrait of Zeno of Citium
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Zeno of Citium

Founder of Stoicism — live in agreement with nature and reason.

StoicismHellenisticAncient Greek334–262 BCE◦ Citium, Cyprus4th century BCE

Overview

A merchant who lost everything in a shipwreck, Zeno turned to philosophy in Athens and founded Stoicism, teaching at the Stoa Poikile (Painted Porch) that gave the school its name. He synthesized Cynic ethics, Heraclitean physics, and Socratic method into a system: the cosmos is a rational, ordered whole pervaded by divine reason (Logos); the good life is to live 'in agreement with nature', that is, in accord with reason; and virtue alone is good, everything else 'indifferent'. His writings are lost but his framework shaped the most enduring philosophy of the ancient world.

What they supported — and why

Live in agreement with nature

SupportedThe goal of life is to live consistently with the rational order of the cosmos and of our own nature.

WhyNature is governed by reason (Logos); flourishing means aligning our will with that rational order rather than fighting it.

Virtue is the only good

SupportedOnly virtue is truly good and only vice truly bad; health, wealth, and reputation are 'indifferents'.

WhySince happiness must be secure and up to us, it cannot depend on external things we don't control — only on our character.

The passions are false judgements

SupportedDestructive emotions arise from mistaken beliefs about what is good or bad and should be corrected by reason.

WhyIf only virtue is good, then fearing or craving indifferents rests on an error; fixing the judgement calms the passion.

Causes championed

  • Living according to reason and nature
  • Inner freedom regardless of circumstance
  • Cosmopolitan human brotherhood

Issues wrestled with

  • What is truly good?
  • How should we relate to what we cannot control?
  • What is the rational structure of the cosmos?

Hurdles faced

  • Rebuilt his life after losing his fortune in a shipwreck
  • Synthesizing rival traditions into one coherent system

Works & books

2 catalogued. Status shows how much survives to today.

Republic

Fragments only

Politeia

A radical vision of a community of the wise living by reason; survives in fragments and reports.

On Human Nature

Lost

Set out the 'live in agreement with nature' formula; not preserved.

Read the texts free

Their works online — Open Library catalogues 2 works & editions, 1 of them free to read in full.

Influenced by

Crates the CynicSocratesHeraclitusDiogenes

In their words

“Man conquers the world by conquering himself.”

— attributed

“The goal of life is living in agreement with nature.”

— via Diogenes Laërtius

Legacy

Stoicism became the dominant philosophy of the Roman elite and, revived today, one of the most widely practiced philosophies of life.

Follow their questions

This thinker is a stop on these paths through philosophy.

Further reading

Cross-checked against these authoritative references.

Authority records

Linked into the wider knowledge graph via Wikidata — the stable spine other sources hang off.