Another key theme of the film is the fragmentation of identity, as the characters struggle to define themselves and find their place in the world. Marion's obsession with her body, for example, leads her to create a fantasy self, one that is reflected in her increasingly extreme and disturbing behavior.

The film's use of rats and other vermin also symbolizes the characters' feelings of powerlessness and despair, as well as their entrapment in their own personal hells.

Requiem for a Dream did not win the Oscar for Best Picture. It was too raw, too aggressive, too real. But it won something rarer: a permanent scar in the cultural memory. Ellen Burstyn was nominated for Best Actress, losing to Julia Roberts in Erin Brockovich . History regards that loss as a travesty. Burstyn’s performance—filmed without the rapid cutting used for the younger actors, forcing her to hold her psychosis in real-time—is arguably the greatest portrayal of mental deterioration ever committed to film.

The Anatomy of a Downward Spiral: Why Requiem for a Dream Still Haunts Us

Harry and Marian’s summer turned cold. The kilo was bad. The dealer wanted his money. Big Tim wanted another favor. Harry sold his mother’s old television—the bulky one from the 80s, the one she watched her soaps on. It bought them one more night. One more float.

"Requiem for a Dream" critiques the excesses of capitalism and consumerism, depicting a world in which individuals are reduced to commodities and their bodies are exploited for profit. The character of Tyrone, a young African American man from a poor neighborhood, becomes embroiled in a world of street hustling and exploitation, highlighting the ways in which systemic inequality perpetuates cycles of poverty and addiction.