Conquest of the Planet of the Apes is genre fiction.
Conquest of the Planet of the Apes is a 1972 science fiction film directed by J. Lee Thompson and written by Paul Dehn . Science fiction film ( or sci-fi ) is a genre that uses speculative , fictional science-based depictions of phenomena that are not fully accepted by mainstream science , such as extraterrestrial lifeforms , alien worlds , extrasensory perception and time travel , along with futuristic elements such as spacecraft , robots , cyborgs , interstellar travel or other technologies . From the 1930s to the 1950s , the genre consisted mainly of low-budget B movies .