The Road (2009)
"Set in a postapocalyptic future, this end-of-days tale follows two survivors, a father and son, who navigate an ash-covered wasteland in search of a better life -- with only a sliver of hope that salvation awaits them at the end of their journey," reads the Netflix blurb introducing The Road (2009), one of the bleakest movies I've ever seen, and one of the best.
Zombies, ever so popular these days in mass culture, are laughable as terror-inducing villains compared to roaming gangs of fellow citizens who've resorted to cannibalism. Aside from the cannibals, there are those who chose suicide, as families, not an unreasonable choice in this world, and those who "carry the fire," to use the Father's words to the Son on their trek to find "the good guys."
This "fire" is of course, our humanity, the divine spark within that separates us from the animals, the level to which most people in this world have descended. Aside from this religious theme, other themes of this excellent film include masculinity, fatherhood, duty, and goodness.
These two evangelical reviews, from Christian Living Resources and Christianity Today respectively, are the most perceptive of the many I've read — The Road and Apocalyptic Road Winds to a Hopeful Place.