I always get a good laugh from lists like these that purport to dig up so-called underrated #scifi movies from the 70s as they are obviously written by people young enough to think Star Wars was the only science fiction film from the decade.
10 Underrated Sci-Fi Movies of the 1970s
From Rollerball to A Boy and His Dog, these are the most underrated sci-fi movies of the 70s!