There many factors that had influenced Macbeth to kill King Duncan. The sister witches, Lady Macbeth, and human nature had all played significant roles into pushing Macbeth to kill King Duncan. First and foremost are the three foul sister witches. They were responsible for planting a seed in Macbeth’s mind that would eventually drive him insane and lead him to killing King Duncan. If it weren’t for the sister witches, Macbeth would gleefully accept his promotion to Thane of Cawdor without contemplating on killing King Duncan. In my opinion, the witches had foretold their predictions to Macbeth as a curse but he isn’t aware of that. For that reason, the witches played a significant role in pushing Macbeth to kill King Duncan and they were responsible
