Protagoras

For other uses, seeProtagoras (disambiguation).

Not to be confused withPythagoras.

Protagoras
Democritus(center)and Protagoras(right) 17th-century painting bySalvator Rosa inHermitage Museum
Born	c. 490 BC Abdera
Died	c. 420 BC(aged c. 70)
Era	Pre-Socratic philosophy
Region	Western philosophy
School	Sophistic movement
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')

Protagoras(/prəʊˈtæɡəˌræs/;Greek:Πρωταγόρας;c. 490 BC– c. 420 BC)was apre-SocraticGreekphilosopherandrhetoricaltheorist. He is numbered as one of thesophistsbyPlato.In his dialogueProtagoras,Plato credits him with inventing the role of the professional sophist.

Protagoras also is believed to have created a major controversy during ancient times through his statement that "Of all things the measure is Man, of the things that are, that they are, and of the things that are not, that they are not" which was usually rendered simply as "Man is the measure of all things," interpreted (possibly wrongly, since he disagreed) by Plato to mean that there is noobjective truth;Protagoras seems to have meant that each person's own personal history, experiences and expectations, developed over their lifetime, determine their judgments, opinions, and statements regarding "truth" (which is the title of the book in which Protagoras made this statement). When a person makes a judgment about a certain thing—good or bad or beautiful or unjust—that person will differ from other people's judgments because their experience has been different.

This concept ofindividualrelativitywas intended to be provocative; naturally, it drew fire from Plato and other philosophers, contrasting with both popular opinion and other philosophical doctrine thatrealityand itstruthmust have an objectivegrounding.But it was part of Protagoras' point that the statement is somewhat counterintuitive. He argued that believing that others' opinions about the world are valid and must be respected, even if our own experience of truth is different, is necessary for a community to base itself and its decisions on open, democratic debate.

Biography

Protagoras was born inAbdera, Thrace,opposite the island ofThasos(today part of theXanthi regional unit). According toAulus Gellius,he originally made his living as aporter,but one day he was seen by the philosopherDemocrituscarrying a load of small pieces of wood he had tied with a short cord. Democritus realized that Protagoras had tied the load together with such perfectgeometricaccuracy that he must be a mathematicalprodigy.Democritus promptly took him into his own household and taught himphilosophy.Protagoras became well known in Athens and even became a friend ofPericles.

The dates of his life are not recorded but extrapolated from writings that have survived the ages. InProtagorasPlato wrote that, before a gathering ofSocrates,Prodicus,andHippias,Protagoras stated that he was old enough to be the father of any of them. This suggests a birth date of not later than 490 BC. In theMenohe is said to have died at approximately the age of 70, after 40 years as a practising Sophist.His death, then, may be presumed to have occurred circa 420 BC, but is not known for certain, since assumptions about it are based on an apparently fake story about his trial forasebeia(impiety) in Athens.

Plutarchwrote that Pericles and Protagoras spent a whole day discussing an interesting point oflegal responsibility,that probably involved a more philosophical question ofcausation:"In an athletic contest, a man had been accidentally hit and killed with a javelin. Was his death to be attributed to the javelin, to the man who threw it, or to the authorities responsible for the conduct of the games?"

Philosophy

Even though he was mentored by Democritus, Protagoras did not share his enthusiasm for the pursuit ofmathematics."For perceptible lines are not the kind of things the geometer talks about, since no perceptible thing is straight or curved in that way, nor is a circle tangent to a ruler at a point, but the way Protagoras used to say in refuting the geometers" (Aristotle, Metaphysics 997b34-998a4). Protagoras was skeptical about the application oftheoretical mathematicsto thenatural world;he did not believe they were really worth studying at all. According to Philodemus, Protagoras said that "The subject matter is unknowable and the terminology distasteful". Nonetheless, mathematics was considered to be by some a very viable form ofart,and Protagoras says onthe arts,"art (tekhnê) without practice and practice without art are nothing "(Stobaeus,Selections3.29.80).

Protagoras also was known as a teacher who addressed subjects connected tovirtueand political life. He especially was involved in the question of whether virtue could be taught, a commonplace issue of fifth century BC Greece, that has been related to modern readers through Plato's dialogue. Rather than educators who offered specific, practical training in rhetoric or public speaking, Protagoras attempted to formulate a reasoned understanding, on a very general level, of a wide range of human phenomena, including language and education. In Plato'sProtagoras,he claims to teach "the proper management of one's own affairs, how best to run one's household, and the management of public affairs, how to make the most effective contribution to the affairs of the city by word and action".

He also seems to have had an interest in "orthoepeia" —the correct use of words—although this topic is more strongly associated with his fellow sophistProdicus.In his eponymous Platonic dialogue, Protagoras interprets a poem by Simonides, focusing on the use of words, their literal meaning, and the author's original intent. This type of education would have been useful for the interpretation of laws and other written documents in the Athenian courts.Diogenes Laërtiusreports that Protagoras devised a taxonomy of speech acts, such as assertion, question, answer, command, etc.Aristotlealso says that Protagoras worked on the classification and proper use of grammatical gender.

The titles of his books, such asTechnique of Eristics(Technē Eristikōn,literally "Practice of Wranglings" — wrestling used as a metaphor for intellectual debate), prove that Protagoras also was a teacher of rhetoric and argumentation. Diogenes Laërtius states that he was one of the first to take part in rhetorical contests in theOlympic games.

EusebiusquotingAristocles of Messenesays that Protagoras was a member of a line of philosophy that began withXenophanesand culminated inPyrrhonism.

Relativism

Protagoras also said that on any matter, there are two arguments (logoi) opposed to one another. Consequently, he may have been the author ofDissoi logoi,an ancient Sophistic text on such opposing arguments.According toAristotle,Protagoras was criticized for having claimed "to make the weaker argument stronger".

Protagoras is credited with the philosophy ofrelativism,which he discussed in his lost work,Truth(also known asRefutations).Although knowledge of Protagoras' position is limited, his relativism is inferred from one of his most famous statements: "Man is the measure of all things: of the things that are, that they are, of the things that are not, that they are not."

Protagoras appears to have meant that each individual is the measure of how things are perceived by that individual. Therefore, things are, or are not, true according to how the individual perceives them. For example, Person X may believe that the weather is cold, whereas Person Y may believe that the weather is hot. According to the philosophy of Protagoras, there is no absolute evaluation of the nature of a temperature because the evaluation will be relative to who is perceiving it. Therefore, to Person X, the weather is cold, whereas to Person Y, the weather is hot. This philosophy implies that there are no absolute "truths". The truth, according to Protagoras, is relative, and differs according to each individual.

Platoascribes relativism to Protagoras and uses his characterSocratesas a foil for his own commitment to objective and transcendent realities and values. Plato ascribes to Protagoras an early form of whatJohn Wildcategorized asphenomenalism.That being an assertion that something that is, or appears for a single individual, is true or real for that individual. However, as described in Plato'sTheaetetus,Protagoras's views allow that some views may result from an ill body or mind. He stressed that although all views may appear equally true, and perhaps, should be equally respected, they certainly are not of equal gravity. One view may be useful and advantageous to the person who has it, while the perception of another may prove harmful. Hence, Protagoras believed that the sophist was there to teach the student how to discriminate between them, i.e., to teachvirtue.

Both Plato and Aristotle argue against some of Protagoras's claims regarding relativity; however, they argue that the concept provides Protagoras with too convenient an exemption from his own theory and that relativism is true for him yet false for those who do not believe it. They claim that by asserting that truth is relative, Protagoras then could say that whatever further theory he proposedmustbe true.

Agnosticism

Protagoras was a proponent of eitheragnosticismor, asTim Whitmarshclaims,atheism,on the grounds that since he held that if something is not able to be known it does not exist.Reportedly, in Protagoras's lost work,On the Gods,he wrote: "Concerning the gods, I have no means of knowing whether they exist or not, nor of what sort they may be, because of the obscurity of the subject, and the brevity of human life."

According toDiogenes Laërtius,the outspoken, agnostic position taken by Protagoras aroused anger, causing the Athenians to expel him from the city, and all copies of his book were collected and burned in the marketplace. The deliberate destruction of his works also is mentioned byCicero.The classicistJohn Burnetdoubts this account, however, as both Diogenes Laërtius and Cicero wrote hundreds of years later and as no such persecution of Protagoras is mentioned by contemporaries who make extensive references to this philosopher.Burnet notes that even if some copies of the Protagoras books were burned, enough of them survived to be known and discussed in the following century.

Spectrum of topics

Nonetheless, very few fragments from Protagoras have survived, although he is known to have written several different works:AntilogiaeandTruth.The latter is cited by Plato, and was known alternatively as,The Throws(a wrestling term referring to the attempt to floor an opponent). It began with the "Man is the measure" (ἄνθρωπος μέτρον) pronouncement. According to Diogenes Laërtius other books by Protagoras include:On the Gods,Art of Eristics,Imperative,On Ambition,On Incorrect Human Actions,On Those in Hades,On Sciences,On Virtues,On the Original State of ThingsandTrial over a Fee.

See also

• Anthropocentrism
• Paradox of the Court

References

• Guthrie, W. K. C.,The Sophists.New York: Cambridge University Press (May 27, 1977).ISBN0-521-09666-9.
• Lee, Mi-Kyoung (2005).Epistemology after Protagoras: responses to relativism in Plato, Aristotle, and Democritus.ISBN978-0-19-926222-9.RetrievedSeptember 22,2016.
• van Ophuijsen, J.M., van Raalte, M., Stork, P.,Protagoras of Abdera: The Man, His Measure.Brill, 2013.ISBN978-90-04-25120-5(hardback);ISBN978-90-04-25124-3(e-book)
• Bartlett, R., "Sophistry and Political Philosophy: Protagoras' Challenge to Socrates". Univ. of Chicago, 2016.ISBN978-0-226-39428-2(hardback)

External links

• Quotations related toProtagorasat Wikiquote
• Laërtius, Diogenes(1925)."Others: Protagoras".Lives of the Eminent Philosophers.Vol. 2:9. Translated byHicks, Robert Drew(Two volume ed.). Loeb Classical Library.
• "Protagoras".Encyclopædia Britannica(11th ed.). 1911.
• Mauro Bonazzi."Protagoras".InZalta, Edward N.(ed.).Stanford Encyclopedia of Philosophy.
• Poster, Carol."Protagoras".Internet Encyclopedia of Philosophy.