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486 BC - 420 BC

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Protagoras (; Greek: Πρωταγόρας; c. 490 BC – c. 420 BC) was a pre-Socratic Greek philosopher and rhetorical theorist. He is numbered as one of the sophists by Plato. Read more on Wikipedia

Since 2007, the English Wikipedia page of Protagoras has received more than 874,089 page views. His biography is available in 66 different languages on Wikipedia (up from 65 in 2019). Protagoras is the 39th most popular philosopher (up from 48th in 2019), the 19th most popular biography from Greece (up from 24th in 2019) and the 7th most popular Greek Philosopher.

Protagoras is most famous for his saying "man is the measure of all things."

Memorability Metrics

  • 870k

    Page Views (PV)

  • 80.89

    Historical Popularity Index (HPI)

  • 66

    Languages Editions (L)

  • 17.61

    Effective Languages (L*)

  • 2.20

    Coefficient of Variation (CV)

Page views of Protagoras by language


Among philosophers, Protagoras ranks 39 out of 1,081Before him are Anaximander, Al-Ghazali, Diogenes, Laozi, David Hume, and Søren Kierkegaard. After him are Thomas More, Maria Montessori, Sun Tzu, Plutarch, Michel de Montaigne, and Origen.

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Among people born in 486 BC, Protagoras ranks 1 Among people deceased in 420 BC, Protagoras ranks 1After him are Callicrates, Archidamus II, and Oenopides.

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In Greece

Among people born in Greece, Protagoras ranks 19 out of 936Before him are Kösem Sultan (1590), Prince Philip, Duke of Edinburgh (1921), Aeschylus (-525), Spartacus (-109), Aristophanes (-448), and Euripides (-480). After him are Philip II of Macedon (-382), Sappho (-630), Plutarch (46), El Greco (1541), Thucydides (-460), and Phidias (-490).


Among philosophers born in Greece, Protagoras ranks 7Before him are Aristotle (-384), Plato (-427), Socrates (-470), Pythagoras (-570), Democritus (-460), and Epicurus (-341). After him are Plutarch (46), Gorgias (-483), Leucippus (-500), Theophrastus (-371), Pyrrho (-365), and Antisthenes (-445).