Euthyphro, Apology, Crito and Phaedo are four philosophical dialogues sorrounding the trial and death of Socrates, written by the Ancient Greek philosopher Plato. In the Euthyphro, Socrates is awaiting trial and attempts to find a universal definition for piety. The Apology is an account of Socrates' speech during his trial, defending himself against charges of blaspheme and corrupting Athenian youths. Crito is a dialogue about justice and social obligation in which Socrates accepts his death sentence. In Phaedo, Socrates attempts to prove the immortality of the soul.