Athenian artists and philosophers waged a constant war, often onstage, against the threat of tyranny and monarchy. This is why you see Greek drama set in Bosnia, although this is not necessarily what I would do. People turn to Greek tragedy when they are trying to express great stress, guilt or emotion. Sometimes it is how you feel about your wife, your kids, your brother, or your fears about survival. The 'Oresteia,' after all, is about your son overthrowing you and your wife knowing your darkest secrets.
Greek tragedy is a great leveler.