Why do people do evil knowing it’s evil? In Macbeth written by William Shakespeare, a brave Scottish general named Macbeth was told by 3 witches that he would one day become the King of Scotland: “All hail Macbeth. Who shalt be king hereafter” (I, iii, 49). Back then, whatever the witches had told you what was going to happen, you believed them; therefore, Macbeth believed he would one day become the King of Scotland. Macbeth was a brace and loyal Thane to King Duncan but when he hears that one day he is going to be King the greed in himself takes over and does what he has to, to be King. With Macbeth being loyal to King Duncan, he does not want to murder him to become King but with his evil wife pressuring him into doing it by calling him a coward and removing the name of Macbeth’s manhood he is basically forced into doing it: “When you durst do it, then you were a man” (I, vii, 49). The witches lead Macbeth to kill King Duncan with a floating dagger. Macbeth follows the dagger and kills King Duncan with it brutally. After Macbeth killed King Duncan he was announced King of Scotland and became power hungry. He was so scared about what he had done that he wasn’t able to sleep and eventually he turns fully evil basically murdering whoever gets in his way. Eventually he is overthrown and gets killed by those who he had wronged. To conclude, why people do evil knowing it’s evil is because they are convinced by others that they can get away with it and love what they get out of it while it lasts.