The year in which Socrates was prosecuted, 399, was one in which several other prominent figures were brought to trial in Athens on the charge of impiety. That is unlikely to have been a coincidence; rather, it suggests that there was, at the time, a sense of anxiety about the dangers of religious unorthodoxy and about the political consequences that religious deviation could bring. Two attempts to put an end to Athenian democracy had occurred in recent years, and the religious scandals of 415 were not so far in the past that they would have been forgotten. Because a general amnesty had been negotiated, no one, except the 30 and a few others, could be tried for offenses committed prior to 403, when the 30 were defeated. But this would not have prevented an accusation from being brought against someone who committed a crime after 403. If Socrates had continued, during the years after 403, to engage in the same practices that were so characteristic of him throughout his adult life, then not even the most ardent supporters of the amnesty would have objected to bringing him to trial. And once a trial had begun, it was common practice for prosecutors to mention anything that might be judged prejudicial to the accused. There was no legal custom or court-appointed judge that would have prevented Socrates’ accusers from referring to those of his admirers—Alcibiades, Critias, Charmides, and the like—who at one time had been enemies of democratic Athens or had been associated with religious scandal. The law that Socrates was alleged to have violated was a law against impiety, but in support of that accusation he also was accused of having corrupted the young. His jury might have taken his association with opponents of the democracy, or with persons convicted or suspected of religious crimes, to be grounds for considering him a dangerous man.

The fact that one of those who assisted in the prosecution of Socrates and spoke against him—Anytus—was a prominent democratic leader makes it all the more likely that worries about the future of Athenian democracy lay behind Socrates’ trial. And even if neither Anytus nor the other prosecutors (Meletus and Lycon) harboured such fears, it is hard to believe that they were entirely absent from the minds of those who heard his case. In any event, because Socrates openly displayed his antidemocratic ideas in his defense speech, it would have been difficult for jurors to set aside his association with opponents of the democracy, even if they had been inclined to do so. Athenian democracy must have seemed extremely fragile in 399. It is only with the benefit of hindsight that we can see that its institutions were strong enough to last most of the rest of the 4th century.

It is not known with certainty whether those who prosecuted Socrates mentioned Alcibiades and Critias at his trial—there is no record of their speeches, and it is difficult to interpret the evidence about what they did say. But it is very likely that specific names were mentioned. In Plato’s Apology, Socrates notes that his accusers alleged of certain individuals that they were his students, an accusation he lamely denies on the grounds that, because he has never undertaken to teach anyone, he cannot have had students. Furthermore, Xenophon reports in Memorabilia that, according to “the accuser,” Alcibiades and Critias were followers of Socrates. The word accuser is taken by some scholars to be a reference to one of the three persons who spoke against Socrates in 399, though others take Xenophon to be defending Socrates against charges made against him in a pamphlet written several years later by Polycrates, a teacher of rhetoric. In any event, many years later, in the 4th century, the orator Aeschines, in his speech “Against Timarchus,” asserted in public that Socrates was convicted because he was “shown to have been the teacher of Critias, one of the thirty who had overthrown the democracy.”

But even if Socrates’ association with Critias and Alcibiades was an important factor leading to his trial and conviction, it certainly was not the only ingredient of the case against him, nor even the most important one. The law that Socrates was alleged to have violated was a law against impiety, and the thrust of his defense, as presented by Plato, was that his life has been consumed by his single-minded devotion to the god. The Socrates who speaks to us in Plato’s Apology has no doubt that the charge of impiety against him must be refuted. There is no reason to suspect that this charge was a mere pretext and that what Socrates was really being prosecuted for was his antidemocratic associations and ideas. The political background of his trial is important because it helps to explain why he was not prosecuted in the 430s or 420s or at any other time of his life. Everything known about him indicates that he was the same man, and lived the same sort of life, in 399 and in 423, the year of Clouds. What made him the object of prosecution in 399, after so many years during which his behaviour was tolerated, was a change in political circumstances. But it remains the case, according to the Socrates of Apology, that his alleged religious unorthodoxy was deeply worrying to his prosecutors and jurors. That is why this allegation receives all his attention.