What are some comparisons between Macbeth and Brave New World?

The biggest comparison between the two would be the theme of knowledge vs. ignorance.  In Brave New World, the citizens are denied knowledge so that they will not be tempted to rebel.  The belief is that in ignorance, they are unaware of what they are missing.  This applies to Macbeth because he had too much knowledge.  The witches gave him so much information, he began to act in ways unusual for him and unproductive in order to speed up the events that were supposed to happen to him.  In he had lived in a Brave New World, he would not have had the knowledge and so would not have become a murderer.