My subject of study has long been 'Shakespearean Tragedy of Anger'. The basis of criticism, I think, is sympathy. I can be sympathized with the heroes in Shakespearean tragedies, Coriolanus, Timons of Athens, Titus Andronicus, King Lear, etc.
Anger causes tragedy.
Anger often makes us forget ourselves. It is unreasonable and usually makes us unable to judge correctly. It is sometimes the origin or source of confusion and tragedy. We often become 'passion's slave'. My research activities conclude that there is the tradition lineage that might be called 'The Story of Anger' in the European literature, Iliad, The Book of Job, Paradise Lost, Wuthering Heights, Moby Dick, etc.