Fight Club (David Fincher, USA, 1999)

You can call [it] irresponsible. Or you can call it the only essential Hollywood film of 1999.
— Time Out

Insomniac and disaffected office worker (Edward Norton) is looking for a way to change his life when he crosses paths with charismatic soap manufacturer Tyler Durden (Brad Pitt). Together they form an underground fight club for men who want to fight recreationally which gradually evolves into something beyond their control.
David Fincher's satirical swipe at consumerism and the male pysche is one of the most controversial films of recent(ish) years. Pre-millennial tension par excellence.