Planet of the Apes 1968

"Somewhere in the universe there must be something better than man. In a matter of time, an astronaut will wing through the centuries and find the answer. He may find the most terrifying one of all on the planet where apes are the rulers and man the beast."

An astronaut crew crash lands on a planet in the distant future where intelligent talking apes are the dominant species, and humans are the oppressed and enslaved.