Oedipus Rex grapples with the concept of determinism, the philosophy that "all events, including moral choices," are predetermined by "previously existing causes" (Britannica.com). It also implicitly supports the theory of the self-fulfilling prophecy. A prophecy is considered "self-fulfilling" when it comes true only because it was predicted to.
The conflict centers around the prophecy that Oedipus's parents, Jocasta and Creon, receive. Hearing that their son will kill his father and marry his mother, the king and queen send their child away to a far-off kingdom. As things turn out, however, their very action serves to fulfill the prophecy. Oedipus kills his father on the road, and takes his mother to wife. Despite Creon and Jocasta's efforts to avert the prediction, it comes true.
Or, is it because Creon and Jocasta try to avert the prophecy that it comes true? Would the foretelling have proven true if the couple had left it alone? If so, perhaps the event was, indeed, predetermined. Perhaps...
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