Sci Fi/Post-Apocalyptic Films: small on scale but big on ideas

Inspired by my recent watching of Monsters I though I'd gather all the sci-fi/post-apocolypitic films that are different from the epic world saving/regime changing hollywood fair and instead use the futuristic/alien environment as a prism through which to examine a wider idea or character. Small on scale (mostly) but big on ideas.

Suggestions would be most welcome!

Read notes
  • Monsters
  • Moon
  • District 9
  • Children of Men
  • Another Earth
  • Blade Runner
  • Super 8
  • The Road
  • The Fountain
  • Primer
  • The Man from Earth
  • Timecrimes
  • The Omega Man
  • The Quiet Earth
  • Attack the Block
  • Melancholia
  • The Book of Eli
  • I Am Legend
  • Immortal
  • Safety Not Guaranteed