The 2006 British-American dystopian science fiction thriller film Children of Men is not an easy film to watch. Based on P. D. James' 1992 novel by the same name, it shows what happens when society can no longer reproduce because hope depends on future generations.
James writes, "It was reasonable to struggle, to suffer, perhaps even to die, for a more just, a more compassionate society, but not in a world with no future where, all too soon, the very words 'justice,' 'compassion,' 'society,’ 'struggle,' 'evil,' would be unheard echoes on an empty air."
This is a deeply unsettling movie, at the end of which you see a lot of hope if you're a hopeful person, and complete hopelessness if you're a bleak person.