Fate and Free Will in Macbeth

Three witches speak riddles on a blasted heath, and from that moment forward, the question of whether Macbeth is a free agent or a puppet of fate will not let the play rest. “Fair is foul, and foul is fair,” they chant, and the boundary between truth and lies, destiny and choice, begins to blur. They do not command Macbeth to kill Duncan. They simply tell him he will be king, and stand back to watch what happens. The prophecy plants a seed—or perhaps it simply names what was already growing there. The genius of the play is that we never know for certain. Macbeth could choose not to act. He could wait for the crown to come to him naturally. Instead, he acts, and in acting, he seems to fulfill a fate that was spoken before he could fight it.

In Act 1, Macbeth is troubled by the witches’ words, but he is also tempted by them. He tells himself that if chance will have him king, then chance can crown him without his stirring. This is a lie he tells himself to avoid responsibility. By Act 2, when he stands over Duncan’s sleeping body, he has moved past this pretense. He kills the king because he chooses to, because his own ambition demands it. The witches’ words no longer feel like fate—they feel like permission. Yet even as he acts freely, we sense that he is being drawn forward by something larger than himself, something inexorable. Lady Macbeth pushes him toward Duncan, but he pushes himself toward Banquo’s murder. His own fear and paranoia become the engines of his destruction.

The witches’ final prophecies seem designed to comfort him, but they are elaborate deceptions. “None of woman born shall harm Macbeth,” they say, which sounds impossible until Macduff reveals he was “untimely ripped from his mother’s womb.” “Macbeth shall never vanquished be until Great Birnam wood to high Dunsinane hill shall come against him,” they say, which also sounds impossible until Malcolm’s soldiers cut branches from Birnam Wood and carry them toward the castle. These are not false prophecies—they are riddles, statements that are literally true but deliberately misleading. The play thus stages a profound question: are the witches lying, or is Macbeth simply incapable of understanding truth when it is spoken in his favor?

By the final scene, Macbeth has learned the answer. The witches’ prophecies were true, but only in ways that destroyed him. He tried to outrun his fate through murder, and his murders brought the very fate he feared. The play offers no final resolution to the question of free will versus determinism. Instead, it suggests that the two are inseparable. Macbeth is responsible for every choice he makes, yet those choices move him inexorably toward a doom that was spoken from the beginning. He did not have to kill Duncan, but once he heard the witches’ words, that killing became inevitable—not because the witches forced him, but because he could not resist the voice inside himself that answered to their call.