Thesis
When observing literature, throughout history, a  series of common themes can be traced.  One such of these themes is the demand, be it personal, devine, or merely by 
fate, for revenge for wrongs done.  This theme can be traced throughout literature, and stand out in three great literary works; Oedipus Rex, The Odessey, and Hamlet.  Each
 work not only forces vengence at the climax but also carries it as an ever present theme throughout the work.

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First observing Oedipus rex, the theme of revenge may not be so evident, but in spite of the simplicity of the layout of the play, Oedipus carries layers of meaning.  In the play
 Oedipus the protagonist becomes the target of revenge by fate its self, and ultimately carries out the act against himself.

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The Odessey features numorous acts of revenge far more obvious than Oedipus.  Beginning with an act of vengence by Poseidon to spite Odyssius for failing to properly 
thank him, for his aid in the Trojan war, it also ends with Odyssius taking his own personal revenge, against the men who've tormented his familly and servants for years.

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No where than Hamlet is the theme of vengence stronger.  Prince Hamlet spends the majority of the story seeking revenge against his uncle, and in his scheming commits 
transgressions against his closest friend Laertes, which would lead Laertes to seek revenge against Hamlet, bringing revenge back on the avenger.