Human ambition question

Human ambition is  what you drive for. Most cases it can be in a postive way.  But macbeth drove to be a king. In order to become a king he had to remove all obstacles in his way. Like the killings of Duncan was an example of an obstacle. according to Shakespeare  play  Human amition can be a negative beacuse it can a lead a human to do anything to achive what he or she wants. as shown in the play macbeth went through everything to become king