Macbeth’s Ambition: Why Is Kingship Not Enough?

In Macbeth, the crown promises more than status: it appears to confirm that Macbeth’s future is already written. Yet becoming king does not end his ambition, because he wants not only to possess authority but to make it secure against chance, rivals, and time. Shakespeare presents this desire for permanence as the source of Macbeth’s worsening fear. The prophecy that he will reign awakens a wish he has not acted on; once he takes the crown through murder, he discovers that power without safety is not enough. His effort to guarantee a dynasty turns kingship from an achievement into a state of continual violence.

At first, Macbeth’s response to the witches’ prediction reveals both the strength and the uncertainty of his desire. In an aside, he calls the prophecy a possible “earnest of success,” but immediately confronts the “horrible imaginings” of murder. He even considers whether “chance will have me king” without his intervention. This hesitation matters: Macbeth does not initially treat the crown as a simple prize that he must seize. The prediction makes kingship imaginable, while his conscience and fear make the path to it unstable. Shakespeare thus shows ambition beginning as conflict between a desired future and the choice to force that future into being.

Lady Macbeth reads the prophecy more decisively. She believes her husband will become king, but fears that his nature is “too full o’ th’ milk of human kindness” to take “the nearest way.” Her language turns kingship into a goal requiring deliberate action, and she offers to overcome whatever restrains him. Macbeth’s hesitation, by contrast, exposes the moral cost that ambition would require. When he later murders Duncan, he does not simply accept an honor predicted by the witches; he chooses to make himself king by violating the trust on which legitimate rule depends. The crown is therefore gained through an act that makes its security doubtful from the start.

The play quickly distinguishes possession of the crown from confidence in one’s authority. Banquo observes that Macbeth has obtained the titles the Weird Women promised, but suspects he “play’dst most foully for’t.” The public fact of Macbeth’s kingship cannot silence the suspicion surrounding how he acquired it. Macbeth, too, knows that his position is vulnerable: he says, “To be thus is nothing, / But to be safely thus.” That blunt distinction reveals what he wants beyond the title. He wants a rule no rival can threaten and no future succession can undo. But authority won through betrayal cannot simply be made secure by holding it.

Banquo’s descendants make the limits of Macbeth’s achievement especially clear. The witches’ prediction suggests that Banquo will father a line of kings, though Macbeth himself now rules. Macbeth calls his crown “fruitless” and his sceptre “barren,” images that make kingship seem empty because it will not pass to his heirs. He admits that he has murdered Duncan for Banquo’s future descendants. His ambition, then, is not satisfied by becoming king; it has expanded into the attempt to control what happens after his death. Shakespeare makes dynastic security an impossible extension of personal power: Macbeth can seize a throne, but he cannot command the future to belong to his family.

The murder of Banquo follows from that fear, but it does not bring peace. Macbeth orders the killing because Banquo’s line threatens the future he wants to control. Afterward, Lady Macbeth recognizes the hollowness of their success: “Naught’s had, all’s spent, / Where our desire is got without content.” Her words frame their power as a bargain in which gaining the object of desire has cost them the ability to enjoy it. Macbeth’s rule depends on further efforts to remove danger, so even apparent victories produce new anxieties. The play suggests that authority secured by violence cannot create the inward safety Macbeth mistakes for the purpose of kingship.

The apparition of Banquo’s royal descendants makes Macbeth confront the future he cannot prevent. As a succession of kings passes before him, he recognizes that the line extends far beyond the present. His horrified reaction shows that the vision defeats his fantasy of dynastic control: although he is king, he cannot make the crown hereditary for his own family. Instead of accepting this limit, he responds to Macduff’s flight by deciding that thought and action must coincide immediately. He orders an attack on Macduff’s household. This choice marks a further corruption of authority: Macbeth treats rule as permission to strike at anyone associated with a threat, even when doing so cannot secure the succession he desires.

Macduff’s household and Scotland’s suffering expose the difference between Macbeth’s possession of power and rightful government. Lady Macduff condemns the abandonment of a family, while the wider political crisis is reflected in Malcolm’s account of the virtues a king should embody, including justice, truth, mercy, and patience. Macbeth’s rule, by contrast, is defined by fear and coercion. At the play’s end, Malcolm is hailed as king and promises to reckon with his supporters, recall exiles, and deal with tyranny’s agents. The restoration does not fulfill Macbeth’s dynastic ambition; it reveals its failure. He could take authority, but his attempt to make it permanent destroys the conditions that make rule legitimate.

How the argument develops

The essay follows Macbeth’s ambition from possibility to consequence. It contrasts Macbeth’s initial hesitation with Lady Macbeth’s determination, then distinguishes holding the crown from feeling secure in it. The succession prophecy explains why Macbeth targets Banquo, while Lady Macbeth’s response shows that gaining power has not brought contentment. Finally, the attack on Macduff’s household and Malcolm’s restoration demonstrate how Macbeth’s private fear corrupts public authority.