7. The Road
The Road is a significant departure from most end of the world films in the sense that the world has pretty much come to an end before the film even begins; the land has been ravaged of its fertility, most people are dead, and those that remain have either lost most semblances of their humanity, or are simply desperate to keep themselves and their loved ones alive. Sunlight is hard to come by, the sky instead filled with a depressing, gray mist, and many humans have resorted to pillaging their fellow man not only for possessions, but for food, also, as in cannibalising them. It is more an existential apocalypse than a literal one; people still walk the Earth, but how many of them are really considered human anymore?
What it tells us: if there's still a physical world left after the cataclysm and you're (un)lucky enough to survive it, be prepared to have a healthy diet of human to feast on, or become a snack yourself.