What is a good feature film (it should not be a documentary or include themes of gore or horror) to analyze sociologically?

What was the main motivation for the early populists

As you drive in to school, you hear a random radio-show caller arguing that sun exposure really has not been shown to cause skin cancer and that some research suggests that skin cancer is completely genetic and not related to sun exposure at all. at the time, you think that this is a silly argument and that the caller does not know what she is talking about. however, two months later, you are outside without wearing sunscreen, and you find yourself remembering that you had read something about how the sun actually does not cause skin cancer. this process is evidence that has influenced your attitude

Acurb of this color means you may not stop a) yellow b)green c) red d) blue