This makes Macbeth the next heir to the throne because he was Duncan's cousin.
The story of Macbeth wasn't written from scratch by Shakespeare it was based on a true story with a few minor changes. Middle She wouldn't allow him to back out calling him a coward and how could he possibly be a real man backing out of what he had said he would do and he was obviously to afraid to do it.
As the play progresses, Macbeth slowly relies on the witches prophecies.
Shakespeare uses the witches as a remedy for Macbeth's curiosity which corrupts his character.
The influence of Macbeth's wife, Lady Macbeth also contributed to his degeneration of character. Middle Therefore Macbeth character displays strong signs of a tragic hero, making him the ideal classic example.
At the beginning of the play Macbeth is seen as a courageous soldier who is loyal to the King but is corrupted from the witches' prophecies and by his and Lady Macbeth's ambition.Act 1 Scene 7- Lady Macbeth persuades Macbeth to kill Duncan.Act 3 Scene 1- Macbeth decided to have Banquo murdered.To get rid of the treat with banquo he decides to kill him and his son Fleance.At this point Macbeth is no longer the true and noble thane he once was, he is a tyrant who took the crown by force.Act 5 Scene 8 -The showdown with Macduff During the time in which Shakespeare was writing Macbeth Scotland was an independent country and totally separate to England.Also during this time A king didn't have to be the old kings son because Macbeth was not King Duncan's son, But King Duncan did want to give his eldest son the heir to the throne but Macbeth frames him and his younger son Malcolm and Donalbain.He is evil because he killed the king with the help of his wife but becomes evil on his own because he goes off by himself in plotting the death of banquo and fleance and latter on to all of the people in the house hold of macduff.Macbeth no longer needs the push from his wife and does this on his own showing his true character.He is a Lord under the rule of King Duncan, and he has no reason to feel unhappy with where he is in life.It's after the meeting with the witches, that he begins to desire the throne, but he still needs Lady Macbeth to convince him to commit the murder, when he questions the consequences and asks "If we should fail? Conclusion The witches also said that Banquo would beget kings but he himself would never be king after Macbeth, and so Macbeth decides that Banquo is a threat to him.