When Socrates was put on trial the official reason was the ‘corruption of the youth’ of Athens. The Peloponnesian  War had just ended and Athens had lost to Sparta and was being ruled by a very unpopular pro-Spartan oligarchy. One of the pro-Spartan rulers was the uncle of Plato who was the most famous student of Socrates. It appears that the uncle may also been a pupil of Socrates. Could there have been a political reason for the arrest and the trial of Socrates by the Athenians?

(The Great Courses – Ancient Greek Civilization)