The Academy Closes

Plato founded a school in a grove outside Athens in the early fourth century before the common era. In one form or another, with interruptions, a philosophical tradition continued there for something close to nine hundred years. In 529 CE the emperor Justinian issued legislation that ended it.

The precise legal instrument and its scope are debated by specialists. What is not debated is the effect: teaching by pagan philosophers at Athens stopped, the endowments were confiscated, and the last head of the school, Damascius, together with a group of colleagues, left the empire.

Where they went is the part of the story that is usually left out. Seven philosophers, Damascius and Simplicius among them, travelled to the court of Khosrow I in Sasanian Persia, having heard that the king was a philosopher. The reality disappointed them and they did not stay. When Justinian and Khosrow concluded a peace treaty in 532, a clause guaranteed the philosophers safe return and freedom from persecution for their beliefs. That clause survives in the historical record. A group of scholars was written into an international treaty as a term of peace.

Simplicius went on to write commentaries on Aristotle that are among the most valuable documents in ancient philosophy, not for his own arguments but because he quotes extensively from earlier works that are otherwise entirely lost. A significant fraction of what is known about the Presocratics survives because Simplicius, writing after the closure, copied their words into his commentaries.

That is the pattern worth naming. The transmission of a tradition frequently runs through the person displaced by its suppression, and the material that survives is the material somebody happened to quote while doing something else.

The closure is often narrated as a single dramatic ending, and that framing does not survive scrutiny. The Athenian school had been in decline. Alexandria remained a functioning centre of Neoplatonic teaching for another century under Christian administration, on terms that involved some accommodation. Philosophy did not stop in 529.

But something specific did. An institutional continuity of nine centuries was broken by an act of state, the property was taken, and the people who held the tradition were dispersed. The knowledge did not vanish. Its institutional home did, and an intellectual tradition without an institution is one generation from being a manuscript.

That is the mechanism this case documents, and it is less dramatic and more effective than destruction. You do not have to burn a philosophy. You defund the place where it is taught, and in fifty years there is nobody left who was trained to teach it.

The material survived here because individuals carried it out, wrote it down elsewhere, and were eventually protected by a clause in a treaty between two empires. That is an extraordinarily fragile chain, and it is roughly how most of what we have from antiquity reached us.

Nine hundred years of continuous teaching, ended by legislation. It is worth knowing how much of the surviving record depends on the accidents that followed.