Toronto School of Communication

by Twyla Gibson, Ph.D.
Senior McLuhan Fellow

The Platonic Canon

While scholars seldom agree on much, one of the few things about which there is a consensus concerns the pieces of the puzzle that we do possess.  It is widely held that Plato=s texts are the earliest body of continuous prose philosophical writing to survive intact.  Since none of the ancient authors refers to any Platonic work that has not come down to us, it appears that, as Richard Kraut has put it, "we possess every philosophical work he ever composed."[1]  In fact, Plato's writings survived transmission better than the works of nearly all other ancient authors.[2]  In this case, then, we are not faced with a situation involving lost works.  Instead, we have a circumstance in which a number of texts that could not have been written by Plato were preserved as part of the collection.  For the most part, these works lack the artistry and complexity of the dialogues that are considered genuine.  We do not know who wrote them or why they were included from so early on with Plato's own writings.  For even in antiquity, it was known that certain books were not authentic.[3]  In the first century C.E., or about four hundred years after Plato=s death, all the writings that make up the canon were published by Thrasyllus, a Platonist and astrologer from Alexandria.  Most of the medieval manuscripts derive from his collection, which is the basis for all modern complete editions.  Apparently in line with earlier tradition, Thrasyllus organized the works credited to Plato into nine tetraologies -- groups of four books -- consisting of thirty-five dialogues in which the thirteen Letters were counted as one work, thereby making a total of  thirty-six.  He also included in his edition an appendix containing nine works that were passed down with the collection but which he regarded as spurious.  To each dialogue, Thrasyllus affixed a double title.  One was frequently taken from the name of the interlocutor, the other from the topic (for example, the Euthyphro was also entitled, On Holiness, the Statesman was called On Monarchy, and the Timaeus was known as On Nature).  Apparently, these topics were popular with many ancient writers.  Lists of books credited to other authors and recorded by Diogenes Laertius or known from other sources indicates that a number of different philosophers all wrote works with these same titles.[4]  Since Thrasyllus included all the books considered authentic plus many whose legitimacy was disputed (for a total of forty-five works), and since none of the ancient authors refers to any Platonic work that we do not possess, it appears that everything Plato ever published has survived.[5]

In piecing together the puzzle of this philosophy, then, we are faced with a most unusual situation.  Numerous works in the corpus cannot have been Plato's own.  Hence, one subject of perennial debate in Platonic scholarship has been the question of drawing the line between spurious works and texts whose authority seems indisputable.  Since the spuria frequently contain philosophical notions clearly at odds with the major texts, a solution to inconsistencies in supposedly authentic dialogues has often been to contest their legitimacy.  At one point in the mid-nineteenth century, all but nine dialogues were declared apocryphal.[6]  Today, the pendulum seems to have swung in the opposite direction.  Strong arguments have been advanced for reinstating a great deal of the corpus, including works long regarded as having been written by other ancient authors.[7]  Thus, not only is Plato significant as the author of the first comprehensive collection of prose philosophy to be put "on paper," he is also unique among authors of the classical age in that all of the written works credited to him by the ancients have been preserved.  One of the difficulties in reconstructing Plato's philosophy, then, is that we are dealing with a puzzle that contains extra pieces.

Read On: Plato - His Education, Teaching and Writing

Read Back: Ancient Philosophy - Piecing Together the Puzzle



[1] Kraut, "Introduction to the Study of Plato," p. 20; also Cooper and Hutchinson, eds., Plato: Complete Works, p. x; Giovanni Reale, A History of Ancient Philosophy: II. Plato and Aristotle, ed. and trans., John R. Catan (Albany: State University of New York Press, 1990), p. 8; John Burnet, Greek Philosophy, I: Thales to Plato (London, 1914), pp. 220-221; A. E. Taylor, Plato: The Man and His Work (New York, 1927), p. 503; G.C. Field, Plato and his Contemporaries (New York, 1930) p. 38; Léon Robin, Platon (Paris, 1935), p. 13.

[2] Wincenty Lutoslawski recites the historical factors which he believed led to the accurate preservation of Plato's texts.  Plato's Academy continued for nearly a millennium after his death, under the direction of a "golden chain" of scholarchs until the school was closed following an order from the emperor Justinian in 529 C.E.  That there was a Platonic school permanently fixed in one place over centuries "explains the preservation of his works in so remarkable a state of correctness and purity."  The probability that the school was a kind of  religious association gave it a stability greater than if it was simply an educational institution.  These associations were respected by the Romans and lasted until Plato's writings were deposited in Christian  monasteries.  According to Lutoslawski, this continuity of religious protection was unusual for authors of the fourth century B.C.  Plato's school continued for more than nine hundred years, outliving those of Aristotle and Epicurus.  In addition, during the fourth and fifth centuries C.E., there was an improvement of writing materials and the papyrus rolls were copied onto parchment.  Whereas the papyri have been preserved only in fragments, the texts copied onto parchment have come down to us intact.  Since Plato's works were copied onto parchment while his Academy was still in existence, Lutoslawski reasoned, they are more likely to be accurate than texts of other writers whose works were not continually read.  He continued: "We also know that many leaders of Plato's Academy spent their lives writing commentaries on the  dialogues.  Such commentaries as those of Proclus . . . show great care for the correctness of the text."  In contrast with many other Greek works which came through Alexandria and Rome, indications of the copyists show that the oldest of Plato's manuscripts were written in Greece, thereby increasing the probability of their descent from the copies of the Academy.  Further, while other ancient writers were despised by the early Christian clergy, Plato was admired by St. Augustine and many others.  The monks who copied the works of Plato in the ninth century transcribed with care, knowing that Plato was held in esteem by the greatest authorities of the Church.  "These unique circumstances explain the survival of Plato's text in a state more correct and authentic than that of contemporary poets or orators, and they further explain why not one of the works written by Plato has perished.  There is no valid testimony as to the existence of a single work by Plato not contained in our collection" [Wincenty Lutoslawski, The Origin and Growth of Plato's Logic (London, New York and Bombay, Longmans, Green, and Co., 1897), pp. 4-7].  See also George Grote, Plato and the Other Companions of Socrates, Vol. I.  (London: John Murray, 1867), especially Chapter 4, "Platonic Canon, as Recognized by Thrasyllus,@" and Chapter 5, "Platonic Canon, as Appreciated and Modified by Modern Critics."  In a more recent study, D.H. Fowler found the evidence for this view to be "either lacking or distorted," and "the whole line of interpretation unfounded" [The Mathematics of Plato's Academy: A New Reconstruction (Oxford: Clarendon Press, 1987), pp. 197-8].

[3] A list of the dialogues regarded as genuine and dubious by the ancient world is recorded in Diogenes Laertius, Lives of Eminent Philosophers, Vol. I, trans., R.D. Hicks (1925; rpt. Cambridge, MA and London, England: Harvard University Press, LCL 184, 1991), pp. 331-332.  For background concerning the authentic and in authentic works, see  J.A. Philip, "The Platonic Corpus," Phoenix 24: 296-308, as well as Thomas L. Pangle, ed., The Roots of Political Philosophy: Ten Forgotten Socratic Dialogues (Ithaca and London: Cornell University Press, 1987), pp. 1-18. 

[4] To give some selected examples listed by Diogenes, to Heraclitus is attributed a composition, On Nature.  Dialogues entitled the Republic and Of Law were written by Zeno.  Of Beauty, On Law, Of Wisdom and On Knowing were written by Crito, a student of Socrates.  Demetrius of Phalerum wrote a Defense of Socrates.  Another friend of Socrates, Simon, wrote Of the Good, On the Just, Of Virtue, On Law, On Philosophy and On Knowledge.  Simmias wrote On Wisdom, On Philosophy, and On the Soul.  Democritus composed On Nature and Of Reason.  Among the works attributed to Protagoras were Of Virtues and Of the State.  Dialogues with the titles, Of Justice, On Philosophy, Of the Statesman, the Sophist, Of the Soul, Of the Good, On Nature, and the Laws were written by Aristotle.  Antisthenes, a pupil of the sophist Gorgias is credited with Of the Good, Of Law, Of Nature, and Of Kingship.  Diogenes, Antisthenes friend and a critic of Plato, wrote a Republic, On Virtue, and On GoodOf Laws, Sophisms, On Nature, On the Soul, Of Kingship, and Of Piety were authored by Aristotle's pupil, Theophrastus.  His successor, Strato, wrote Of Kingship, Of Justice, Of the Good, On the Philosopher-King, and Of the Soul.  Speusippus, Plato's nephew and successor at the Academy wrote On Justice, On Legislation, and On Philosophy.  His student, Xenocrates, is said to have written works with the titles, On the Soul, On Nature, On Holiness, and That Virtue Can Be Taught.  Cleanthes wrote the Statesman, Of Knowledge, and Of Kingship.  His follower is credited with writing a Republic, and the works: On Justice, Of Virtue and Of the Good.  To Epicurus is attributed the titles: Of Piety, Of Justice and the Other Virtues, and Of Kingship.  As far as I know, only one commentator has noted that all the ancients gave the same titles to their works.  Gilbert Ryle mentioned a comment in Isocrates to the effect that orators chose their themes from an authorized list, and wonders if competitors at festivals chose themes for their dialogues out of such a list as well  [Plato's Progress (Cambridge: Cambridge University Press, 1966), p. 35].

[5] John M. Cooper and D.S. Hutchinson, eds., Plato: Complete Works (Hackett Publishing Company: Indianapolis/Cambridge, 1997), pp. viii-ix.

[6] Alan C. Bowen, "On Interpreting Plato," Platonic Writings, Platonic Readings, ed., Charles L. Griswold, Jr. (New York: Routledge, Chapman & Hall, 1988), p. 52; and Cooper and Hutchinson, Plato: Complete Works, pp. x-xi.

[7] Pangle, Political Philosophy, pp. 1-21.

 

 

 

Creative Commons License
This work is licensed under a Creative Commons License.

The McLuhan Program in Culture and Technology
mcluhan.program@utoronto.ca