Banquo is Macbeth’s equal in rank and courage—a general who fights beside him on the battlefield and stands with him when the three witches speak their riddling prophecies. Unlike Macbeth, who hears the witches hail him as future king and immediately begins plotting, Banquo suspects their words are a trap. He warns Macbeth that “the instruments of darkness tell us truths, / Win us with honest trifles, to betray’s / In deepest consequence.” He recognizes what Macbeth cannot: that truth and temptation are not the same thing, and that supernatural knowledge can be weaponized against the hearer. This makes Banquo the play’s moral voice in the opening acts—he sees the danger that Macbeth’s ambition blinds him to.
But Banquo is also bound by the witches’ prophecy in a different way. They promise that his children will be kings, while Macbeth will have no heirs. This prophecy, though it seems to favor Banquo, becomes the reason for his death. Macbeth, paranoid that Banquo will discover his crimes or that Banquo’s line will eventually usurp his throne, orders both Banquo and his son Fleance murdered. Banquo dies in Act 3, his throat cut in a roadside ambush. His ghost appears to Macbeth at a banquet, driving the king further into madness and isolation—a visual manifestation of guilt that Lady Macbeth dismisses as mere imagination, but which Macbeth alone can see. Fleance, his son, escapes into darkness, and this escape is crucial: it ensures that the witches’ prophecy about Banquo’s descendants becoming kings will eventually come true, even though Macbeth has killed the father.
Banquo’s tragedy is one of innocence caught in the machinery of other people’s ambition. He does nothing to deserve his fate. He remains loyal to Duncan, he suspects the witches’ tricks, and he explicitly refuses to act on temptation. Yet his very existence—his loyalty, his children, the promise made to him—becomes intolerable to Macbeth. In killing Banquo, Macbeth believes he is preventing the future; in reality, he is fulfilling it. Banquo’s death demonstrates that in this play, knowing the future does not save you from it. The only thing worse than ignorance is being caught between knowledge and powerlessness.
