People and ideas can greatly affect the outcome of a person’s life, determining whether the outcome will be successful or disastrous. Decisions and actions can also influence outcome. This is the case in Macbeth. Many factors cause the ruin of Macbeth and for that reason, all the blame for his downfall cannot be placed on Macbeth himself, despite the fact that he is the one that commits or has people commit the murders which lead to his downfall. Lady Macbeth’s encouragement and convincing lead Macbeth to take the first step towards his destruction. The witches and their prophecies are equally accountable, since the witch