Zeno of Citium

Zeno of Citium (c. 334–262 BCE) was a Greek philosopher from Citium on Cyprus who founded Stoicism in Athens, where he taught in the Stoa Poikile, the painted colonnade from which the school takes its name. Originally a merchant, he is said to have turned to philosophy after a shipwreck. He wrote several works, including a Republic, but none survive complete. His doctrines of virtue as the sole good, living in accordance with nature, and the unity of humanity under one cosmic reason were developed by his successors Cleanthes and Chrysippus.