Protagoras Archives



More Generally: Historical Thinkers (239)

October 17, 2008

Quote of the Day: Why do Relativists Write Books?

The sophist Protagoras of Abdera (c. 490-420 BC) wrote a book entitled Truth (which does not survive) in which he argued that 'man is the measure of all things;' an early form of relativism. In Plato's Theaetetus, Socrates gives the following review of Protagoras' book: Well, I was delighted with his general statement of the theory that a thing is for any individual what it seems to him to be; but I was astonished at the way he began. I was astonished that he did not state at the beginning of the Truth that 'Pig is the measure of all things'...
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