Based on a book of the same name, Fight Club is a psychological film of an unnamed everyman as he breaks away from society to fulfill a desire for violence and chaos. Inspired by his own split personality, Tyler Durden, the man sees his underground fighting circles, created to satisfy a repressed bloodlust, spin out of control into the domestic terrorist outfit Project Mayhem. The film comments on capitalism and masculinity in America, being the tale of a repressed man taking the escape from corporate sanitization to its logical extreme.
In the dark novel Fight Club, an unnamed protagonist who suffers from insomnia meets a man named Tyler Durden. After the protagonists' condo explodes, he moves in with Durden. The two form a "fight club," which allows them to let off steam through violence. The fight club catches on and turns into an anti-consumerist group that commits terrorist acts. The protagonist grows uncomfortable with the group's actions. He learns that he and Tyler are the same person and finally makes a decision that will separate himself from Tyler forever.