Ancient Greek Skepticism (from skepsis, meaning “inquiry”) emerged in the Hellenistic period as a major philosophical movement, primarily in two forms: Academic Skepticism (within Plato’s Academy, led by figures like Arcesilaus and Carneades) and Pyrrhonian Skepticism (founded by Pyrrho of Elis, c. 360–270 BCE, and later systematized by Sextus Empiricus, c. 160–210 CE).
Pyrrhonism, the more radical and enduring strand, rejects dogmatic assertions about reality. Skeptics argue that for every claim, an equally compelling counter-claim exists (equipollence or isostheneia), leading to suspension of judgment (epochē). This avoids belief in non-evident matters (matters not immediately recognised as true from your own experience), preventing disturbance (tarachē) and yielding tranquility (ataraxia)—the ultimate goal.
Unlike dogmatists (who affirm truths) or negative dogmatists (who deny truth is possible), true skeptics continue inquiring without committing to doctrines.
They use “modes” e.g., Agrippa’s five:
- disagreement,
- infinite regress,
- relativity,
- hypothesis,
- circularity
to balance opposing arguments, showing no criterion, for certain knowledge is reliable.
Short example: Faced with conflicting sensory reports (e.g., a tower appears round from afar but square up close), or cultural differences in customs (e.g., one society eats pork, another finds it taboo), the skeptic suspends judgment on the “true” nature of the tower or morality. Instead of asserting “it is round” or “pork is unclean,” they say “it appears round to me now” and live by appearances/practical needs, achieving calm without dogmatic stress.
Resources (reliable, accessible introductions):
- Skepticism in 90 Minutes: A Beginner’s Guide to Finding Clarity by Questioning Certainty. Andrew L. Graham
- Skepticism: A Beginner’s Guide to the Ancient Art of Suspending Judgment, Including the Ten Modes and the Search for Peace of Mind. Alex Omberg
- Internet Encyclopedia of Philosophy: Ancient Greek Skepticism – https://iep.utm.edu/ancient-greek-skepticism/
- Britannica: Pyrrhonism – https://www.britannica.com/topic/Pyrrhonism
- Sextus Empiricus, Outlines of Pyrrhonism (Annas/Barnes translation, Cambridge University Press) – excellent primary source intro.
- YouTube: “Introduction to Ancient Scepticism: Pyrrhonism” (detailed overview video) – https://www.youtube.com/watch?v=k_SAocFtlio