Pyrrhonism was one of the two main skeptical
traditions in ancient philosophy. It originated in the Hellenistic era and continued into the Imperial age. The history of ancient Pyrrhonism is commonly divided into the
early Pyrrhonism of Pyrrho of Elis (360–270 BC) and his leading disciple Timon
of Phlius (320–230 BC), and the later Pyrrhonism (sometimes called
“neo-Pyrrhonism” particularly in French scholarship) of Aenesidemus of Cnossos (first
century BC) and Sextus Empiricus (late second century AD).