The article ranks the defining science-fiction film from each decade, arguing that the genre’s priorities, technology and cultural concerns have evolved significantly over time. It presents these films as milestones that shaped both cinematic technique and science fiction’s wider history.

– 1930s — Frankenstein: James Whale’s adaptation, led by Boris Karloff, is praised for its striking black-and-white imagery and enduring influence on popular depictions of the monster.
– 1940s — Krakatit: This Czechoslovakian mystery follows a chemist troubled by creating a powerful explosive, using hallucinations to warn of the dangers of weapons and emerging Cold War tensions.
– 1950s — Godzilla: Ishirō Honda’s original film is celebrated for combining spectacle with a lasting critique of nuclear weapons, human greed and humanity’s destructive potential.