Oedipus Rex

The inevitability of fate is on of the largest themes in Sophecles Oedipus Rex. Then entire story is a lesson on how it is impossible to cheat fate. This was a reocurring theme in Greek Myth. The ancient greeks believed that the gods more specifically the Fates decided the life of a person. This of course meant that people have very little free will. Through dramatic irony Sophecles shows it is impossible to defy fate. 

After learning that he will kill his father and marry mother (whom he believes to be Merope and Polybus of Corinth) Oedipus attempts to avoid his fate by fleeing from Corinth to Thebes. What Oedipus didn't know was that the Merope and Polybus were not his birth parents. His parents were Jocasta and Laius the king and queen of Thebes who left Oedipus exposed on the hill to die as a baby, having learned of the prophecy themselves. As fate would have it Oedipus runs into his farher Laius on the road to Thebes and in a fight murders the man never knowing his relation to the man. He moves to Thebes and marrys the newly widowed Jocasta, completeing the prophecy.
Oedipus had abseloutly no free will in this story. Or rather no control of his fate. All of the choices he made led exactly to the prophecy that Apollo and the fates had set up for him. The greeks would argue that the choices that Oedipus makes were pre-destined as well, no matter what he would make the decisons thay he did