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For the same reasons they are still entertaining, and why any dramatic entertainment is entertaining: they tell interesting stories, and have interesting people doing and saying interesting things.
Included? Included in what?
Elizabethan plays defied the unities of time and place. They included acts of violence on the stage, and included dozens of characters over extensive periods of time and a wide range of locations. The characters shared soliloquies with the audiences, in which they articulated their most private thoughts and feelings. They plays took advantage of the stages which acted as permanent unit sets.
a lot of people myself included
Some of the fears that the Victorians had included a fear of the supernatural. These included a fear of possession and of ghosts and vampires. They also feared disease.
Catholicism.
Elements of Catholicism
Classic female Disney characters such as Snow White, Cinderella and Jasmine from Aladdin are included in the princess pantheon.
A universal theme is included in most classics, as well as careful use of language, and memorable characters.
Her interest included, acting, & dancing.
Bigwelt
Technically, Macbeth was never performed for an Elizabethan audience, as Queen Elizabeth died about three years before it was written. Audiences of that time, and indeed audiences of any time, enjoyed and enjoy plays with supernatural elements in them, witches included. Shakespeare wrote lots of plays with ghosts (Hamlet, Julius Caesar and Richard III as well as Macbeth), magicians (The Tempest), fairies (A Midsummer Night's Dream) as well as witches. And so did his contemporaries write plays with ghosts (Kyd's The Spanish Tragedy), magicians (Greene's Friar Bacon and Friar Bungay), and witches (Middleton's The Witch and Dekker and Rowley's Witch of Edmonton). Shakespeare did not put the Devil in any of his plays but others did (Marlowe's Doctor Faustus, The Birth of Merlin and Barnes's The Devil's Charter) Many of these plays were much more successful than Macbeth.