The Gods Must Be Crazy (1980)
Written and directed by Jamie Uys, this film tells the story of a Bushmen band in the Kalahari Desert whose world is turned upside down when a Coke bottle falls from the sky and lands in their small community. The bottle is believed to be a gift from the gods and it becomes a useful tool for the group, who lacks modern technology, until people start fighting over it. Xi, the main character, volunteers to walk to the end of the earth to destroy it.
There are several sequels to the original film, which was hugely successful. Check out The Gods Must Be Crazy for more information. You can view sections of the film on YouTube.
Critics have labeled the film racist, and Keyan Tomaselli wrote an article, "Rereading the Gods Must Be Crazy Films", published in Visual Anthropology in 2006, that examines this issue.