For a movie to come to be considered a "classic" is no mean feat, and I will argue that David Fincher's Fight Club (1999) is one such film.
Every classic film's themes are relatable and timeless. Lesser movies are ridiculous period pieces that never hold up because. people are sure to look back at The Last Jedi, for example, and say, "Third wave feminism and patriarchy were a thing? Boring!"
Fight Club warns of the danger of trying to control human nature.
And, no, the movie is not "anti capitalism," as some have argued.