Alfonso Cuarón's Children of Men paints a grim future where humanity faces impending extinction due to a mysterious, global infertility crisis. The film’s protagonist, Theo, a disillusioned bureaucrat, becomes an unlikely hero as he protects Kee, the first pregnant woman in nearly two decades. Their harrowing journey through a dystopian Britain teeming with chaos and despair culminates in Theo's ultimate sacrifice. He dies from his injuries shortly after securing Kee's passage to the "Human Project," a group of scientists dedicated to curing infertility. While the film leaves a glimmer of hope with the sound of children's laughter overlaying the credits, it is deeply shadowed by the immense personal losses endured. Children of Men offers a profound reflection on the paradox of survival in a dying world, emphasizing the heavy toll that hope can exact in times of despair.

Bong Joon-ho's Snowpiercer offers a stark portrayal of class warfare set aboard a perpetually moving train that houses the last remnants of humanity after a catastrophic climate change event. The train, divided into rigid social classes from tail to engine, becomes a battleground as Curtis, the protagonist from the impoverished tail section, leads a violent revolt against the elites controlling the front. The climax is catastrophic: the train is derailed during the conflict, leading to the deaths of nearly all aboard. Onlya few survivors emerge from the wreckage to face a desolate, ice-bound Earth with no promise of safety or survival. This bleak ending serves as a powerful allegory for the destructive potential of societal divisions and the uncertain future of humanity when it prioritizes oppressive hierarchical systems over cooperation and unity.