The role of the undead alters from the influence in “Hamlet” to the intelligent creatures bent on survival in both “Frankenstein” and “I am Legend”. The changes don’t affect the intelligence of these creatures but rather, the focus of them instead. This said, the creatures do gradually become more physically violent towards the time period of “I am Legend”
In “Hamlet” the role of the undead is to influence Hamlet to kill his uncle as well as to bring light to the facts behind his father’s murder. While the creature may not be his father there is still the chance that what it says about the murder is true. The ghost convinces Hamlet to murder his uncle, who was said to have killed Hamlet’s father, which causes a minor dip in Hamlet’s sanity.
In “Hamlet” the role of the undead is to influence Hamlet to kill his uncle as well as to bring light to the facts behind his father’s murder. While the creature may not be his father there is still the chance that what it says about the murder is true. The ghost convinces Hamlet to murder his uncle, who was said to have killed Hamlet’s father, which causes a minor dip in Hamlet’s sanity.