In this unit:
use the following sites to explore the theatre in Shakespeare's time:
Macbeth is Shakespeare’s shortest tragedy, and tells the story of a brave Scottish general named Macbeth who receives a prophecy from a trio of witches that one day he will become King of Scotland. Consumed by ambition and spurred to action by his wife, Macbeth murders King Duncan and takes the throne for himself. He is then wracked with guilt and paranoia, and he soon becomes a tyrannical ruler as he is forced to commit more and more murders to protect himself from enmity and suspicion. The bloodbath and consequent civil war swiftly take Macbeth and Lady Macbeth into the realms of arrogance, madness, and death.
from Wikipedia. http://en.wikipedia.org/wiki/Macbeth
Read Aristotle's definition of tragedy.