Protagoras
Greek philosopher
Protagoras was a pre-Socratic Greek philosopher and rhetorical theorist. He is numbered as one of the sophists by Plato. In his dialogue Protagoras, Plato credits him with inventing the role of the professional sophist. Wikipedia
Born: Abdera, Greece
Died: Miletus, Türkiye
Influenced by: Parmenides, Democritus, and Zeno of Elea
Main interests: Language, semantics, relativism, rhetoric, agnosticism, ethics
Notable ideas: 'Sophist' as teacher for hire, man–measure doctrine ('Man is the measure of all things')
School: Sophistic movement