One of the main themes of the book “Fight Club” is mental illness, mixed with loneliness and freedom from society's expectations. Tyler, one of the main characters, is created due to the protagonists' lack of connection with the people around him. The protagonist had a feeling of loneliness and attended several support groups to alleviate this feeling. He was not rejected by support groups because members thought he was sick just like them, but the feeling of his loneliness was not alleviated. Materialism is another recurring theme. The narrator mentions how he has worked all his life for the cheap and poor items in his apartment. He tried to fill the void in his life by purchasing worthless and meaningless things. In the end, it turns out that the narrator finally discovers that Tyler was a figment of his imagination. At that point he has to stop it. To get rid of Tyler, end Project Mayhem and all of Fight Club; however, it was not an easy task. Tyler didn't want to leave and this conflict was resolved with the narrator only after he shot himself and then killed himself. It seems that this mental voice is productive, it changes him the way he wants to change; however, it is also destructive as it becomes a negative and explosive relationship, eventually leading to a suicide attempt. Overall, the story of Fight Club develops around mental illness, our narrator's battle, outside patient, with the voice inside him. Large themes including materialism and freedom in society are explored through this story. One of the main themes of Fight Club is the response to the rejection of consumer society through the use of violence. Fighting was a way to free a man from society. Material objects are seen as malevolent because they enslave and control us. We desire many luxuries and take them for granted. Our society is largely based on the materialistic desires of consumers resulting from advertising and marketing. This demand distracts us from who we truly are and should be destroyed. The filmmakers adapted many of these meanings into the film that was