You should keep in mind the fact that 'power struggles' is connected to other societal issues like, gender, class, ethnicity, and even goes further to territorial supremacy. Also, don't forget that any piece of literature say, Shakeare's tragedies like, "Hamlet" or "Romeo and Juliet", is a slice of real life differently expressed along the history. Comedies (see Molliere), for instance, produce laghter by using puns, wit or sarcasm when dealing with issues humans face everyday.