All great tragedies involve, to varying degrees, the psychological fall of the protagonist. To explain this point it is simple to turn to two tragedies that have remained famous over the centuries. These are "The Spanish Tragedy" by Thomas Kyd and the film adaptation of Shakespeare's tragedy "Macbeth" by Roman Pollanski. They prove the point through literary techniques such as foreshadowing, soliloquies etc. and, in the case of Macbeth, through additional visual techniques that increase the realism of psychological emancipation, demonstrate that although all great tragedies are in part tragedies of the mind and that tragedy of the mind is vital for another tragedy to occur because , as Jacques Barzun famously said, “Only a great mind that is overthrown produces tragedy.” However there are other forces, actions, etc. which influence what is seen as tragedy. Through the expert use of soliloquies by both Thomas Kyd and William Shakespeare they reveal the madness in the minds of their respective protagonists Hieronimo and Macbeth and how it is their psychological downfall that ultimately brings about the physical tragedy. Hieronimo and Isabella both go mad with grief after the murder of their son Horace. Through the soliloquies he tells we see Hieronimo's pain manifest itself in an active and pervasive way while Isabella's is in a passive and oppressed way. Hieronimo's madness drives and yet delays the tragedy. His paroxysms manifest in soliloquies and his strange visions create tension, while simultaneously repelling the final act of revenge. “This way or that way? Sweet and just, it's not like that: because if I hang myself, we know, who will then avenge Horace's murder? This question is at the heart of the document of his weak mind, but there are other forces acting on the tragic final event. In conclusion, referring to Thomas Kyd's Spanish tragedy and Roman Pollanski's film adaptation of Shakespeare's Macbeth all great tragedies are partly realized through tragedy in the minds of the main protagonists of Hieronimo and Macbeth and through the madness of secondary characters such as Isabel and Lady Macbeth. However there must be elements of the play to bring about this psychological tragedy and in addition to this there are aspects in both tragedies of the superhuman and the divine which apparently influence the ending. In light of all this it can be said with certainty that all great tragedies are at least partly a tragedy of the mind, but that the tragedy of the human mind is not seen as the only reason for the final tragic conclusion of the play..