Revenge

• Revenge and justice are key themes in the play.
• Justice is done by Duncan when the Thane of Cawdor is killed for treason.
• Macbeth killing Duncan's guards was not justice but Macbeth tries to make people believe it was by blaming Duncan's murder on the guards. This begins a series of revenge.
• "Blood will have blood" (3:4) reminds us that Banquo is supposedly seeking revenge for the death of Duncan by haunting Macbeth. In 4:1, he smiles at Macbeth, indicating his revenge is complete as his descendants should become kings.
• The play culminates in the ultimate act of vengeance - Macduff's killing of Macbeth for the death of his family.