One Million B.C. (1940)

"One Million B.C." is a 1940 American fantasy film directed by Hal Roach and Hal Roach Jr. The story follows Tumak, who is exiled from the aggressive Rock Tribe after failing to assert his dominance. He encounters Loana from the peaceful Shell Tribe, who teaches him their cooperative ways. Tumak struggles to adapt but eventually helps unite both tribes against a common threat, including a volcanic eruption.