486 BC - 420 BC

Photo of Protagoras

Icon of person Protagoras

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 1,016,210 page views. His biography is available in 70 different languages on Wikipedia (up from 66 in 2019). Protagoras is the 46th most popular philosopher (down from 40th in 2019), the 23rd most popular biography from Greece (down from 19th in 2019) and the 8th most popular Greek Philosopher.

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

Memorability Metrics

  • 1.0M

    Page Views (PV)

  • 79.60

    Historical Popularity Index (HPI)

  • 70

    Languages Editions (L)

  • 16.70

    Effective Languages (L*)

  • 2.47

    Coefficient of Variation (CV)


Among philosophers, Protagoras ranks 46 out of 1,267Before him are David Hume, Sun Tzu, Rajneesh, Laozi, Empedocles, and Origen. After him are Ludwig Wittgenstein, John Amos Comenius, Lucretius, Hannah Arendt, Anaxagoras, and Plotinus.

Most Popular Philosophers in Wikipedia

Go to all Rankings


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.

Others Born in 486 BC

Go to all Rankings

Others Deceased in 420 BC

Go to all Rankings

In Greece

Among people born in Greece, Protagoras ranks 23 out of 1,024Before him are Aristophanes (-448), Plutarch (46), Aeschylus (-525), Sappho (-630), Philip II of Macedon (-382), and Prince Philip, Duke of Edinburgh (1921). After him are Thucydides (-460), Bayezid II (1447), Spartacus (-109), Phidias (-490), Hayreddin Barbarossa (1478), and Xenophon (-430).


Among philosophers born in Greece, Protagoras ranks 8Before him are Plato (-427), Socrates (-470), Pythagoras (-570), Democritus (-460), Epicurus (-341), and Plutarch (46). After him are Gorgias (-483), Theophrastus (-371), Antisthenes (-445), Pyrrho (-365), Isocrates (-436), and Clement of Alexandria (150).