why macbeth killed duncan

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…showed last 75 words of 658 total…the power hungry one but in the end Macbeth himself possesses the ruthlessness. There are many explanations as to why Macbeth killed Duncan. I feel that he killed him because of his power hungry wife. Throughout the play there are many scenes, which verify my position. Lady Macbeth is not evil but in the beginning of the play she is ruthless and power hungry. She was the original catalyst, which led Macbeth to kill Duncan.