Who is to be blamed for Duncan's murder?

James the 1 strongly believed in witchcraft, and Shakespeare used this idea to appeal to him. Shakespeare used the ideas of witchcraft, kingship, and the moral order to develop the play, as these themes were greatly admired in the Jacobean ere. The opening of the play contains many subtle links to the supernatural. The three witches open the scene in an open place with thunder and lightning, which was believed in superstitious times that fierc...