People have a hard time getting what they want; in fact, the things they want can be incompatible with each other. In Shakespeare's Macbeth, the protagonist is lured to murder the king, Duncan, by the desire for power, an appetite honed by witch's prophecies and his wife's encouragement. But when he reaches the kingship, he finds himself insecure. He attempts to remove threats that decrease his security, including his companion Banquo and his son Fleance, predicted to be king. His lords grow angry and revolt successfully, after witches lure Ma ....