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Good Apocalyptic 60's and 70's Movies

Omega Man
THX-1138
Soylent Green
Planet of the Apes
Westworld
Andromeda Complex
Logan's Run
Fantastic Voyage
Fahrenheit 451 (need to see)
Silent Running
2001: Space Odyssey (the most polished)
Alien
Rollerball
Death Race 2000
Close Encounters of the Third Kind
Star Trek
Colossus: The Forbin Project
Demon Seed
The Man Who Fell to Earth
A Clockwork Orange
Last Man on Earth
The Time Machine
Mad Max