Note 8 — Chapter V · LIFE OF PLATO.

Xen. Mem. iii. 6, 1. Sokrates was induced by his friendship for Plato and for Charmides the cousin of Plato, to admonish the forward youth Glaukon (Plato’s younger brother), who thrust himself forward obtrusively to speak in the public assembly before he was twenty years of age. The two discourses of Sokrates — one with the presumptuous Glaukon, the other with the diffident Charmides — are both reported by Xenophon.

These discourses must have taken place before the battle of Ægospotami: for Charmides was killed during the Anarchy, and Glaukon certainly would never have attempted such acts of presumption after the restoration of the democracy, at a time when the tide of public feeling had become vehemently hostile to Kritias, Charmides, and all the names and families connected with the oligarchical rule just overthrown.

I presume the conversation of Sokrates with Glaukon to have taken place in 406 B.C. or 405 B.C.: it was in 405 B.C. that the disastrous battle of Ægospotami occurred.