In the play "Macbeth" written by William Shakespeare there are two main characters by the name of Macbeth and Lady Macbeth.

        The reason they share responsibility in the Killing of Duncan is because that they both knew what was going to happen. In the first mention of it by Lady Macbeth to kill King Duncan she shared responsibility with Macbeth who agreed with her. Without Lady Macbeth egging him on Macbeth would have probably not committed the crime that would later on be the downfall and the reason that both characters went insane and Lady Macbeth kill’s herself. Even though Macbeth himself committed the murder they still share the responsibility because both knew of what was going on and both had something to do with the murder of Duncan and the both of them did nothing to question it and to even try to stop them.

         Other than that they don’t share the responsibility, for instance with the killing of Banquo and Macduff's family. Lady Macbeth pleaded with Macbeth not to do anything about the situation with Banquo even though she had no idea what he was going to do she still felt something and at least tried to stop her husband. So all the responsibility is on Macbeth because he is the one who thought of this and who is the one who believed the witches prophecies. He is the one who was power hungry and relenting in his reign to be all-powerful and king forever. So in the murder of Banquo he does not share any responsibility with anyone but himself.

        Another way that Macbeth has all the responsibility lying on him for his downfall and Lady Macbeth's demise is that he went on to decide that he would kill Macduff’s family because he though tit would keep Macduff in England away from his castle and away from his seat on the throne. This was his entire fault, his anger, and fear of being taking off the throne was the major reason that this tragic event took place and is really the reason that his downfall was secured. So the reason that its all his fault is because again he planned plotted and executed the death and destruction of Macduff’s family and his land. Which was highly unnecessary.

        All in all Macbeth's demise and death was all his fault and in all of the major tragic events except the death of Duncan Macbeth holds all responsibility of the way that these tragic events turned out and he bears the responsibility of his own downfall and demise from King.