The reveal that the narrator and Tyler are the same person transforms the film from social satire into psychological horror. Every scene must be re-evaluated. The violence was always self-inflicted. The revolution was always a one-man breakdown dressed in ideological costume.

This twist exposes the film's deeper argument: the desire for a charismatic leader to solve your problems is itself the disease, not the cure. Tyler is what happens when legitimate grievances are channeled through narcissistic fantasy rather than genuine community.