The Canon of Plato (Thrasyllus' Attestation)

The canon of Plato's works has been supplied to us by a certain ancient authority named Thrasyllus, about whom we know very little. He is the source quoted by Diogenes Laertius in his life of Plato and this provides a list of thirty-six works grouped together into nine tetralogies as follows:

THE NINE TETRALOGIES

*Euthyphro, Apology, Crito, Phædo
*Cratylus, Theætetus, Sophist, Statesman
*Parmenides, Philebus, Symposium, Phædrus
*Alcibiades, 2nd Alcibiades, Hipparchus, Rival Lovers
*Theages, Charmides, Laches, Lysis
*Euthydemus, Protagoras, Gorgias, Meno
*Hippias major, Hippias minor, Ion, Menexenus
*Clitophon, Republic, Timæus, Critias
*Minos, Laws, Epinomis, [Letters]

THE THIRTY-FIVE WORKS

Note that the final tetralogy includes the Letters, which is not a dialogue. So, in total, there are thirty-five dialogues or philosophical works ascribed to Plato by this ancient attestation, leaving the Letters aside. (Actually, some of the "dialogues" are not dialogues, but that is another matter. See below. Collectively, we call them "dialogues".) 

Modern scholarship questions the authenticity of some of these works, but usually on the basis of a preconceived idea of what is and is not Plato. This is always an open question. Take a work such as Rival Lovers. Modern scholars agree that in terms of literary style and its Greek it seems on a par with the other works in the canon; it is rejected because its content is deemed "unworthy of Plato's philosophical mind." That is, its' content conflicts with our idea of who Plato was and what he believed and what he taught. This, however, is highly debatable in itself; it is hardly a sure criterion by which to decide authenticity, all other things being equal.

We can be much less sure about this distinction than we can be sure of the fact that these works are all, at least, in the school of Plato. That is, among all the philosophical works of Greek antiquity, there is a set of thirty-five works which, ancient testimony attests, are definitely Platonic if not by the hand of Plato himself. For the ancients, that is a less important question. Regarding the works that modern scholars deem spurious: if they are not by Plato then they are by his immediate followers such as Philip of Opus. For the ancients, that was good enough. The subsequent Platonic tradition, in any case, accepted these thirty-five works and regarded Thrasyllus' list as canonical and was not too concerned with strict standards of authorship. 

On this matter I follow the ancient tradition. I'm not very interested in modern squabbles about what is and is not by Plato the man and I mistrust the process by which these matters are decided. I want to avoid debates about authenticity and I want to have a secure canon with which to work. Thrasyllus gives us a secure canon. He tells us what works the ancients, (within the next two hundred or so years after Plato) reckoned Platonic. This is the accepted ancient (and medieval) canon and so - by tradition, if for no other reason - these are all works by "Plato". The name "Plato" may, I admit, refer not only to Plato the man but also, in some cases, to his school. The Epinomis is a good example. Modern scholarship says it is by Philip of Opus. Maybe so, but for our purposes he is still called "Plato". For practical purposes here Plato is somewhat interchangeable with his school; when we say "Plato" we may mean, in fact, "Plato and his school". The canon, that is, may include faithful pseudepigrapha. I am less perturbed about this prospect than I am about imposing an inappropriate and debilitating historicism.

This, I think, is the only way to approach a canon. Otherwise, you get bogged down in disputes about what is authentic and what is spurious and the business of philosophy never begins. The best approach is to draw a line and embrace a canon and be done with it. In this case, I see no compelling reasons to draw the line anywhere other than where it was drawn by ancient attestation.

I therefore take and recommend the following stance:

Of these thirty-five works we say: whoever wrote them was Plato!

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There is some basis for the general notion that the works were written in groups in Plato himself: in the Timaeus, for example, there is a projected scheme of three dialogues, a trilogy. So we know that Plato at least sometimes conceived of ensembles of dialogues - trilogies - rather than conceiving of the dialogues each as a stand alone work. 

The arrangement into groups of four imitates the known practice in Athenian drama: four plays (three tragedies and a comedy) form a single dramatic group. The assumption is that Plato conceived of his dialogues as philosophical dramas and wrote them in programmes of four in the same way as the dramatists. This doesn't conflict with the abode-mentioned trilogy structures because the dramatic tetralogy is three tragedies plus one comedy, a trilogy plus an addendum. 

Clearly, some extant dialogues belong together. But which dialogues belong with which? It is a very complex question. Is there, moreover, a single over-arching scheme uniting the tetralogies or whatever other groupings we discern in the canon?

Here are a few useful points about the thirty-five dialogues:

Performed dialogues = 26
Narrated dialogues = 9

Narrated dialogues narrated by Socrates = 6
Narrated dialogues narrated by other than Socrates = 3

Narrated to a named person = 2
Narrated to an unnamed person = 2
Narrated to an indeterminate audience = 5

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Regarding the over-all organizing principle of the canon, it is my contention that the dialogues are grouped around various Athenian religious festivals and that the various dialogues are related to one or more deity. I am especially interested in the time signatures in the dialogues. I think that Plato wrote works for particular times in the Athenian calendar. Sometimes this is explicit but often it is just hinted at. For instance, in the Parmenides we are explicitly told that it is set on the Greater Panathenaea. In the Phaedrus, on the other hand, it is only the chirping of the cicadas in the trees that lets us know it is high summer.





- Harper