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Antiphon the Sophist lived in Athens probably in the last two decades of the 5th century BC. There is an ongoing controversy over whether he is one and the same with Antiphon (Ἀντιφῶν) of the Athenian deme Rhamnus in Attica (480–411 BC), the earliest of the ten Attic orators. For the purposes of this article, they will be treated as distinct persons.

Contents 1 Antiphon of Rhamnus 2 Antiphon the Sophist 2.1 "Nature" requires liberty 2.2 "Nature" requires equality 3 Mathematics 4 Notes 5 References 6 External links 7 Further reading

Antiphon of Rhamnus was a statesman who took up rhetoric as a profession. He was active in political affairs at Athens, and, as a zealous supporter of the oligarchical party, was largely responsible for the establishment of the Four Hundred in 411 (see Theramenes); upon restoration of the democracy shortly afterwards, he was accused of treason and condemned to death. Thucydides (viii. 68) famously characterized Antiphon's skills, influence, and reputation:

“

...He who concerted the whole affair [of the 411 coup], and prepared the way for the catastrophe, and who had given the greatest thought to the matter, was Antiphon, one of the best men of his day in Athens; who, with a head to contrive measures and a tongue to recommend them, did not willingly come forward in the assembly or upon any public scene, being ill-looked upon by the multitude owing to his reputation for cleverness; and who yet was the one man best able to aid in the courts, or before the assembly, the suitors who required his opinion. Indeed, when he was afterwards himself tried for his life on the charge of having been concerned in setting up this very government, when the Four Hundred were overthrown and hardly dealt with by the commons, he made what would seem to be the best defence of any known up to my time.[1]

”

Antiphon may be regarded as the founder of political oratory, but he never addressed the people himself except on the occasion of his trial. Fragments of his speech then, delivered in defense of his policy (called Περι μεταστασεως) have been edited by J. Nicole (1907) from an Egyptian papyrus.

His chief business was that of a logographer (λογογραφος), that is a professional speech-writer. He wrote for those who felt incompetent to conduct their own cases — all disputants were obliged to do so — without expert assistance. Fifteen of Antiphon's speeches are extant: twelve are mere school exercises on fictitious cases, divided into tetralogies, each comprising two speeches for prosecution and defence—accusation, fence, reply, counter-reply; three refer to actual legal processes. All deal with cases of homicide (φονικαι δικαι). Antiphon is also said to have composed a Τεχνη or art of Rhetoric.

A treatise known as On Truth, of which only fragments survive, is attributed to Antiphon the Sophist. It is of great value to political theory, as it appears to be a precursor to natural rights theory. The views expressed in it suggest that its author could not be the same person as Antiphon of Rhamnus; for it affirms strong egalitarian and libertarian principles appropriate to a democracy but presumably antithetical to the oligarchical views of one who was instrumental in the anti-democratic coup of 411. (See W. K C. Guthrie, The Sophists (Cambridge: Cambridge University Press, 1971)

On Truth juxtaposes the repressive nature of convention and law (nomos) with "nature" (physis), especially human nature. Nature is envisaged as requiring spontaneity and freedom, in contrast to the often gratuitous restrictions imposed by institutions:

Most of the things which are legally just are [none the less] ... inimical to nature. By law it has been laid down for the eyes what they should see and what they should not see; for the ears what they should hear and they should not hear; for the tongue what it should speak, and what it should not speak; for the hands what they should do and what they should not do ... and for the mind what it should desire, and what it should not desire. (Antiphon, "On Truth," Oxyrhynchus Papyri, xi, no. 1364, fragment 1, quoted in Donald Kagan (ed.) Sources in Greek Political Thought from Homer to Polybius ("Sources in Western Political Thought, A. Hacker, gen. ed.; New York: Free Press, 2965)

Repression means pain, whereas it is nature (human nature) to shun pain.

Elsewhere, Antiphon wrote: "Life is like a brief vigil, and the duration of life like a single day, as it were, in which having lifted our eyes to the light we give place to other who succeed us." Mario Untersteiner comments: "If death follows according to nature, why torment its opposite, life, which is equally according to nature? By appealing to this tragic law of existence, Antiphon, speaking with the voice of humanity, wishes to shake off everything that can do violence to the individuality of the person." (Mario Untersteiner, The Sophists, tr. Kathleen Freeman (Oxford: Basil Blackwell, 1954) Cambridge: Cambridge University Press, 1971, p. 247)

Furthermore, Antiphon anticipated the natural rights theories of Hobbes, Locke, Rousseau, and the United States Declaration of Independence by identifying nature as human nature, that is, what all human beings have in common, which makes them equal by nature. Since by our nature, we are all equally human, no one is by nature the master or servant of anyone else. Antiphon derided invidious distinctions of class and nationality. He wrote:

[Those born of illustrious fa]thers we respect and honour, whereas those who come from an undistinguished house we neither respect nor honour. In this we behave like barbarians towards one another . For by nature we all equally, both barbarians and Greeks, have an entirely similar origin: for it is fitting to fulfil the natural satisfactions which are necessary to all men: all have the ability to fulfil these in the same way, and in all this none of us is different either as barbarian or as Greek; for we all breathe into the air with mouth and nostrils…" (On Truth, Oxyrhynchus Papyri, xi, no. 1364, fragment 2, quoted in Untersteiner, p. 252)

Further information: Bryson of Heraclea#Pi and squaring the circle

Antiphon was also a capable mathematician. Antiphon, alongside his companion Bryson of Heraclea, was the first to give an upper and lower bound for the value of pi by inscribing and then circumscribing a polygon around a circle and finally proceeding to calculate the polygons' areas. This method was applied to the problem of squaring the circle.

• Edition, with commentary, by Eduard Maetzner (1838)
• text by Friedrich Blass (1881)
• R. C. Jebb, Attic Orators
• Plutarch, Vitae X. Oratorum
• Philostratus, Vit. Sophistarum, i. 15
• van Cleef, Index Antiphonteus, Ithaca, N. Y. (1895)
• Antiphon
• Michael Gagarin, Antiphon the Athenian, 2002, U. of Texas Press. Argues for the identification of Antiphon the Sophist and Antiphon of Rhamnus.
• Gerard Pendrick, Antiphon the Sophist: The Fragments, 2002, Cambridge U. Press. Argues that Antiphon the Sophist and Antiphon of Rhamnus are two, and provides a new edition of and commentary on the fragments attributed to the Sophist.

• Xenophon's Memorabilia 1.6.1-.15 presents a dialogue between Antiphon the Sophist and Socrates.
• Speeches by Antiphon of Rhamnus on Perseus
• A bio on Antiphon of Rhamnus by Richard C. Jebb, The Attic Orators from Antiphon to Isaeos, 1876 on Perseus
• O'Connor, John J; Edmund F. Robertson "Antiphon (person)". MacTutor History of Mathematics archive.  
• The Stanford Encyclopedia of Philosophy article on "Callicles and Thrasymachus"[1] discusses the views of Antiphon the Sophist.

• Kerferd, G.B. (1970). "Antiphon". Dictionary of Scientific Biography 1. New York: Charles Scribner's Sons. 170-172. ISBN 0684101149. 

v • d • e Attic Orators
Antiphon | Andocides | Lysias | Isocrates| Isaeus | Aeschines | Lycurgus | Demosthenes | Hypereides | Dinarchus

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This article incorporates text from the Encyclopædia Britannica Eleventh Edition, a publication now in the public domain.