-Power Struggle: The ambition of Claudio suggested in Act 1 by the ghost who says he is the King and was killed by his own brother.
-Incest: Because his uncle now is husband of Hamlet's mother
-Existentialism doubt and sanity: Hamlet doubts about the information he heard about a ghost and his own mental health. He was the king's son and now is responsible to find the justice and fulfill his father expectantios of revenge his death.
