Revenge. Revenge causes one to act blindly through anger, rather than through reason. It is based on the principle of an eye for an eye, but this principle is not always an intelligent theory to live by. Young Fortinbras, Laertes, and Hamlet were all looking to avenge the deaths of their fathers. They all acted on emotion, and this led to the downfall of two, and the rise to power of one. Since the Heads of the three major families were each murdered, the eldest sons of these families swore vengeance, and two of the three sons died while ....