Macbeth's Tragic Flaw In William Shakespeare's Macbeth, Macbeth's tragic flaw combined with the outside pressures bring about the dramatic transformation of the main character, the tragic hero, from a courageous man with great potential into a killer. In the beginning of the play, Macbeth is a heroic warrior willing to fearlessly fight for his country. His darker side is detected, but not yet fully shown . He gradually changes to a selfish, power-hungry king who is driven solely by his ambition and the Macbeth is more fully developed, but he is no longer brave, loyal, honest, or trustworthy. Event