There are a lot of themes in Phantom of the Opera which resonate in modern society. One which comes to mind is the theme of social ostracism and how it can contribute to warping people's behavior. The Phantom's quest for revenge is, in his mind, justified, because he has been mistreated by society. He thinks that he will not be accepted for who he is, and, therefore, has to wear a mask in order to make society accept him. This is a theme that, in its general sense, is applicable in every society; many people feel they need to "wear a mask" in a metaphorical sense in order to fit in, whether or not this is really true. In more nuanced senses, we could identify the Phantom's behavior with the thread that often connects modern high school shooters and terrorists——people who feel they have been ostracized from society, usually young white men who have found it difficult to make friends and fit in, commit depraved acts in order to draw attention to themselves because they feel that, otherwise, they are ignored. In The Phantom of the Opera, the theme of anger driven by the hero's sense of rejection is certainly relevant to us today and a concern to which we have not yet found a solution.