Oedipus Rex Applied

I think Oedipus Rex applies to my big question because fate could easily be viewed as nature, or what should happen (though the Greek Gods do complicate this fact.) Beyond this fact, Oedipus has wounded feet, becomes blind, and has he genetics of his parents. So one view of this novel could be that fate wins. It is more powerful than the human trying to escape it's grasp. Fate is all powerful in the story (or at least to the point that Oedipus kills his father and marries his mother.) He can do nothing to go against his nature. Another view would be that his parents trying to survive (survival of the fittest) do all  that they can to hinder him from succeeding. They wound his feet and send him off to be killed. Here another two opinions could separate. Some could feel that Oedipus is the fittest where as others could feel his parents are. Nonetheless, he survives when in nature he should not do so. This could be as Sophocles arguing that he overcomes nature which would imply that he may be better than nature. I don't love this book for the question but I don't think it gives a definitive side to my quesiton.