Shakespeare wrote the play after attempts to usurp the king

The witches equivocate and create confusion

Lady Macbeth calls on malevolent forces to aid her in murdering

Both Macbeth and Lady Macbeth are duplicitous when in public

Regicide was the worst possible sin in Shakespeare's time

Macbeth is praised for his valour at the beginning of the play

Macbeth's friend, Banquo, is sceptical of the witches' predictions

Macbeth's castle is besieged by the English army

The Thane of Cawdor is executed for his treachery