Diogenes laertius: Did you mean...?

Xenophon of Athens (l. 430 to c. 354 BCE) was a contemporary of Plato and a fellow student of Socrates. He is best known for his Anabasis (The March Up Country) detailing the retreat of the Ten Thousand Greek mercenaries after the defeat...

Sextus Empiricus (l. c. 160 to c. 210 CE) was a Greek Skeptic who developed the ideas of the earlier Greek Skeptic philosopher Pyrrho of Elis (l. c. 360 to c. 270 BCE) who claimed that tranquility of mind was attainable by suspending judgment...

Zeno of Citium (l. c. 336-265 BCE) was the founder of the Stoic school of philosophy in Athens, which taught that the Logos (Universal Reason) was the greatest good in life and living in accordance with reason was the purpose of human life...

Diogenes sitting in his tub. Painting by Jean-Léon Gérôme (1860 CE)

An 18th century CE painting showing Diogenes of Sinope looking for an honest man (Johann Heinrich Wilhelm Tischbein - Nagel Auktionen)

Modern statue of Diogenes of Sinope (c. 404-323 BCE) in Sinop (northern Turkey). The 5.50 m tall statue depicts the Cynic philosopher standing with his dog on his dwelling barrel and lantern in hand, searching for an honest man.

Anaxagoras (l. c. 500-c. 428 BCE) was a Pre-Socratic Greek philosopher who claimed the First Cause of existence was Mind (nous) and all things were constituted of indestructible “seeds” (or “stuff”), originally a single mass, separated and...

Aristarchus of Samos (l. c. 310 - c. 230 BCE) was a Greek astronomer who first proposed a heliocentric model of the universe in which the sun, not the earth, was at the center. Although his theory was noted by other thinkers of his time...

Empedocles (l. c. 484-424 BCE) was a Greek philosopher and mystic whose work harmonized the philosophies of Parmenides (l. c. 485 BCE), Heraclitus (l. c. 500 BCE), and Pythagoras (l. c. 571 to c. 497 BCE) in presenting a unified vision of...

Philolaus (l. c. 470 to c. 385 BCE) was a Pythagorean philosopher who claimed that fire was the first cause of existence and heat the underlying source of human life. He is best known for his pyrocentric model of the universe, which replaced...