In Shakespeare’s play Macbeth, Macbeth wants Banquo and Fleance dead because he sees them as threats to his power. After the witches prophesy that Macbeth will become king, they also predict that Banquo’s descendants will inherit the throne. This prophecy troubles Macbeth because it suggests that his own reign will not be long-lasting, and that Banquo’s line will eventually take over.
Macbeth’s fear is further fueled by his own ambition and paranoia. Having already murdered King Duncan to seize the throne, Macbeth is determined to eliminate any potential threats to his rule. Banquo, who is a close friend and ally, becomes a target because of the witches’ prophecy. Fleance, Banquo’s son, is also seen as a threat because he represents the continuation of Banquo’s line.
Macbeth’s decision to have Banquo and Fleance killed is driven by his desire to secure his position as king. However, this act of violence only deepens his guilt and paranoia, leading to further tragic consequences in the play.