Zeno, Cleanthes and Chrysippus

In brief

Zeno of Citium founded the Stoic school in Athens around 300 BCE.[1][11] Cleanthes succeeded him, and Chrysippus later became its most influential systematiser.[1][11] Their sequence matters because the school was not a finished doctrine delivered by one founder: its arguments and terminology developed across generations.[1][11] Nearly all the early Stoics’ books are lost, so our knowledge comes through quotations, summaries and hostile or sympathetic reports by later writers.[1][11]

Life

Zeno came from Citium in Cyprus and taught in Athens at the Painted Stoa, from which the school took its name.[1][11] Cleanthes had worked as a boxer before joining the school, according to the biographical tradition.[1][11] Chrysippus, from Soli, wrote extensively and became known for developing Stoic logic as well as its physical and ethical arguments.[1][11] The precise details in ancient biographies are not all equally secure; Diogenes Laertius preserves useful testimony, but his work is a much later compilation rather than a contemporary record.[1][11]

What survives

No complete treatise by Zeno, Cleanthes or Chrysippus survives.[1][11] Cleanthes’ Hymn to Zeus is a notable exception among early Stoic writing, while much of the rest is preserved as fragments and reports in authors such as Diogenes Laertius, Cicero and later doxographers.[1][11] These witnesses differ in purpose and attitude.[1][11] A quotation from a critic may preserve an argument accurately while framing it adversarially; a later summary may compress distinctions that mattered to the original author.[1][11]

In the tradition

The early Stoics developed a system with three connected parts: logic, physics and ethics.[1][2][3][4] Chrysippus’ role was so extensive that later writers treated the school’s fortunes as tied to his work.[1][2][3][4] Roman Stoics such as Seneca, Epictetus and Marcus inherited this tradition but wrote in different genres and circumstances.[1][2][3][4] Their texts should not be read as if every doctrine had remained unchanged across five centuries.[1][2][3][4]

Further reading

See the Stanford Encyclopedia entry on Stoicism and Diogenes Laertius, Book VII.

Sources

[1] https://plato.stanford.edu/entries/stoicism — Stoicism — Stanford Encyclopedia of Philosophy [2] https://plato.stanford.edu/entries/seneca — Seneca — Stanford Encyclopedia of Philosophy [3] https://plato.stanford.edu/entries/epictetus — Epictetus — Stanford Encyclopedia of Philosophy [4] https://plato.stanford.edu/entries/marcus-aurelius — Marcus Aurelius — Stanford Encyclopedia of Philosophy [11] https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.01.0258%3Abook%3D7%3Achapter%3D1 — Diogenes Laertius, Lives of Eminent Philosophers VII.1 — Perseus