Thrasymachus was a citizen of Chalcedon, on the Bosphorus. His career appears to have been spent as a sophist at Athens, although the exact nature of his work and thought is unclear. He is credited with an increase in the rhythmic character of Greek oratory, especially the use of the paeonic rhythm in prose, and a greater appeal to the emotions through gesture.
Quote from Plato's Thrasymachus in Republic I
338c: Ἄκουε δή, ἦ δ᾽ ὅς. φημὶ γὰρ ἐγὼ εἶναι τὸ δίκαιον οὐκ ἄλλο τι ἢ τὸ τοῦ κρείττονος συμφέρον..[1] (“Listen—I say that justice is nothing other than the advantage of the stronger.”)This forceful statement is dated from 426 BCE more or less. I'm just quoting it after 25 centuries.
Yesterday at Auditori. Jordi Savall and Le Concert des Nations. Impressive.