Why do modern audiences relate to adaptions of Macbeth?

The play Macbeth deals with a number of issues which modern audiences can relate to, especially the corrosive mental effect of guilt and the fear which it causes. This issue also can be found in Edgar Allen Poe's "The Telltale Heart" or Dostoevsky's Crime and Punishment. The issue of whether or not we are masters of our fate is also one which people think about. Since we do not actually have the original play Shakespeare wrote (the only published version was revised and adapted by someone else to add musical numbers) essentially all performances of this play are adaptations.