This was the stage of the argument at which the Protagoras concluded.
He may be regarded as standing in the same relation to Gorgias as Hippocrates in the Protagoras to the other great Sophist.
The Protagoras arrived at a sort of hypothetical conclusion, that if 'virtue is knowledge, it can be taught.
Hence we are led to place the Dialogue at some point of time later than the Protagoras, and earlier than the Phaedrus and Gorgias.
For who can admit the fault imputed to Homer by Protagoras
,--that in the words, 'Sing, goddess, of the wrath,' he gives a command under the idea that he utters a prayer?
Of which kind also, Plato, in his Protagoras
, bringeth in Prodius in scorn, and maketh him make a speech, that consisteth of distinction from the beginning to the end.
In an early dialogue of Plato's, the Protagoras, Socrates asks Protagoras why it is not as easy to find teachers of virtue as it is to find teachers of swordsmanship, riding, or any other art.
So the Athenians, when they were founding their model new colony at Thurii, employed Hippodamus of Miletus, whom Aristotle mentions in Book II, as the best expert in town-planning, to plan the streets of the city, and Protagoras as the best expert in law-making, to give the city its laws.
There are nearer approaches to modern metaphysics in the Philebus and in the Sophist; the Politicus or Statesman is more ideal; the form and institutions of the State are more clearly drawn out in the Laws; as works of art, the Symposium and the Protagoras
are of higher excellence.
The name is an allusion to the condemnation of the works of Protagoras
by the Athenian Areopagus.
Leaving aside the interpretation-of-Simonides interlude, (1) the Protagoras
has a ring structure with the discussion of akrasia at its philosophic center, (2) successively bracketed by a discussion of courage, (3) the unity of virtue, (4) the teachability of virtue, (5) and arguably by the two dramatic introductions (since the first introduction actually takes place after the action of the rest of the dialogue).
Aqui es cuando se invoca a Protagoras
, con su conocida frase de "el hombre es la medida de todas las cosas".