Socrates was executed in 399 BCE, and he left nothing behind. No treatise, no dialogue, no notes. Everything we know about the man comes through other people's writing — chiefly Plato's, partly Xenophon's, glancingly Aristotle's. The central figure of Western philosophy reaches us entirely at second hand.
This is usually treated as an accident of history, the way we treat the lost works of Heraclitus or the burned library at Alexandria. It was not an accident. It was a position.
The argument against writing
The clearest statement of it appears, with some irony, in a text: Plato's Phaedrus. Socrates tells a story about the Egyptian god Theuth, who invents writing and presents it to the king as a recipe for memory and wisdom. The king is unimpressed. Writing, he says, will produce forgetfulness in the souls of those who learn it, because they will rely on external marks instead of remembering from within.
The objection sharpens from there. A written text cannot answer a question. Ask it something and it keeps repeating the same thing. It cannot tell who should read it and who should not, cannot adjust itself to the person in front of it, and when it is misunderstood it cannot defend itself — it always needs its author to come to its rescue.
For a philosopher whose entire method was the live encounter — the question, the answer, the follow-up that dismantles the answer — this is not a stylistic preference. A written argument is a corpse of an argument. The thing itself only happens between two people who are actually talking.
What we get instead
So we have portraits. Plato's Socrates is a metaphysician who ascends from appearance to reality; the theory of Forms arrives in his mouth and it is genuinely unclear where the teacher stops and the student begins. Xenophon's Socrates is more practical and considerably more conventional — a sensible man giving sound advice about household management and friendship. Aristotle, writing later and with less reverence, credits him narrowly: with inductive arguments and universal definitions, and pointedly not with the Forms.
Three portraits that do not reconcile. Scholars call this the Socratic problem, and it has no solution, only positions.
The tempting move is to treat this as a loss — if only someone had taken down his actual words. But that gets the situation backwards. A verbatim transcript of Socrates would have been exactly the dead thing he objected to. What survives instead is the only form his philosophy could take: other people, changed by the encounter, arguing about what it meant.
The irony that follows
Plato spent a lifetime writing dialogues, which is to say he spent a lifetime writing down conversations in order to preserve a man who thought conversations should not be written down. He clearly felt the tension: the dialogues are not treatises, and Plato never appears in them in his own voice. The form is a compromise — an attempt to keep the argument moving on the page, to make the reader do some of the work.
Whether that compromise succeeds is a question the tradition has never settled. But it is worth noticing what it produced. The refusal to write is the reason we have the dialogues. The silence generated the library.
There is a lesson in it about sources that applies well beyond Socrates. What reaches us is never simply what happened; it is what someone decided was worth writing down, in a form they chose, for reasons of their own. The catalogue on this site is full of thinkers who survive only in fragments quoted by their enemies. Socrates is the rarer case: a man who survives, vividly and in enormous detail, precisely because he refused to leave a record.