Sure, Macbeth temporarily decides to call off the murder, but does he really fight his wife on this subject? He does not have to play the part his wife pushes on him and does not have to get the blood of the king on his hands. Instead, he lets himself be led by his manipulative wife. Furthermore, Macbeth does not even realize how serious the murder plan is and only says “if we should fail” (Act 1.7 Line 58). He does not even care that he is about to murder someone in cold blood and is only scared that he will get caught. At this point, Macbeth just lets the malignant behavior control him.
The ultimate downfall for Macbeth is his extreme ambition. He is willing to do anything to get what he wants; in addition, he is willing to kill those closest to him to get the power he thinks is rightfully his. In the most extreme case, he was willing to kill both Banquo, and his son, Fleance, in order to make sure he stays on the