The witches, Lady Macbeth, and Macbeth himself, are all responsible for Macbeth's downfall. The witches predicted the future of Macbeth, which made him self confident. Lady Macbeth encouraged Macbeth to act upon the witches" predictions. Macbeth led himself into a powerful downfall after taking advice from everyone else but himself. He allowed others to determine his actions. There is not only one particular person who was responsible for the downfall of Macbeth. .
The witches led to the beginning of Macbeth's downfall. The witches confronted Macbeth predicting, "All hail, Macbeth! Hail to thee, Thane of Glamis! All hail, Macbeth! Hail to thee, Thane of Cawdor! All hail, Macbeth, that shalt be king hereafter!" A.1, S.3, L. 51-53. These predictions gave Macbeth a self assurance that he would be prosperous. He was then led to believe that these predictions would come true, but they would need to be acted upon. Hecate wisely said, "Security is mortals" chiefest enemy." A.3, S.6, L.33-34. This statement was very true in the case of Macbeth. Although the witches did not directly lead Macbeth into a downfall, they set the mind frame for his actions.
Lady Macbeth played a very persuasive role in the downfall of Macbeth. After Macbeth relayed to her the witches" predictions, she strongly encouraged Macbeth to act upon them. Lady Macbeth strongly expected her husband to murder Duncan, against his own judgment. She placed his manhood on his decision, "When you durst d it, then you were a man; and to be more than what you were, you would be so much more the man." A.1, S.7, L.56-58. Lady Macbeth did not directly kill Duncan, but she was strongly responsible for altering Macbeth's mind to conduct the deed that would carry out the witches" predictions.
Macbeth, although influenced by others, had the greatest role in his downfall. Macbeth listened to the ideas of other, rather than listening to himself.