Underrated Sci-Fi Movies Set in a Lawless Post-Apocalyptic Frontier (Ranker)

"One of the most popular sub-genres of science fiction is the end-of-the-world dystopian future. For decades, these types of films have entertained the masses as they warned humanity of its impending doom à la the 'Planet of the Apes' or 'The Terminator.' Whatever the situation, it seems difficult for us to imagine a futuristic society that's not terrible, and while these films may say something about this fatalistic approach to our future, all they're really about is entertainment. But not every movie in this sub-genre does well. In fact, most of the time, they do horribly. Usually, it's not due to lack of story or great acting, but to the fact that people simply don't flock to see them in the theaters. Eventually, they wind up becoming cult classics, though that doesn't help a studio's bottom line. Regardless, many of these movies are legitimate masterpieces." - ranker.com