-360 – -270
Pyrrho of Elis (c. 360–270 BCE) was an ancient Greek philosopher and the founder of Pyrrhonism, the earliest systematic school of philosophical skepticism. He advocated epoché—suspension of judgment on all non-evident matters—as the path to ataraxia (tranquility), arguing that since appearances conflict and no criterion exists to adjudicate between them, neither assent nor denial is warranted.
Founded Pyrrhonism, the first systematic school of philosophical skepticism in the Western tradition
Developed the practice of epoché (suspension of judgment) as a philosophical method
Linked skeptical practice to eudaimonia by arguing that ataraxia follows from suspending judgment
Influenced later Academic Skeptics (Arcesilaus, Carneades) and the Neo-Pyrrhonist Sextus Empiricus
Reportedly encountered Indian gymnosophists during Alexander's campaigns, possibly influencing his outlook