1) In the 1920s, middle class attitudes in America changed as the country experienced postwar prosperity, prohibition, changing sexual attitudes, and the rise of the automobile. People socialized less at church and more divorces occurred. 2) Movies became an outlet for expressing new ideas and influenced cultural changes as young people emulated behaviors they saw on screen like drinking, smoking, and dressing differently. However, this mainly impacted the white middle class and was opposed by conservatives. 3) By depicting different cultures and behaviors, films began to spread stereotypes and influence public opinion internationally as an entertainment medium. The movie industry further drove cultural changes in other nations as well.