Movie suggestions: post-apocalyptic society-rebuilding films

Okay, so I'm in the middle of watching Things to Come, a film somewhat based on an H.G. Wells novel, and it leaves me wanting more movies of the same general theme: humankind goes through some sort of apocalypse that forces it to rebuild itself into a different society, for better or worse. I can already think of a few movies - The Matrix series, Waterworld (blech), The Postman (blech, again), The Road Warrior, Red Dawn, Battlefield Earth (ha!), and The Terminator series.

What other movies follow this similar pattern? I prefer movies that show the apocalypse at the beginning and then the rebuilding throughout, but I'm not picky. Give me a good "the world's going to blow up" movie any day. I'm a sucker for that sort of stuff.

Oh, and I'm not partial to to TV shows either. Star Trek is a perfect example of this: After the mythical World War III, humankind somehow manages to reform itself into a utopia and meet interesting aliens in the process after breaking the light-speed barrier. Good stuff...