Valenti, Jack. "Ratings History: How it All Began". Motion Picture Association of America Online. <http://www.mpaa.org/Ratings_HowItAllBegan.asp>.

This article, written by former president of the MPAA Jack Valenti, details how the MPAA film rating system was conceived. He describes the turbulent national scene in 1966 – women’s rights, civil rights, youth protests, and “crumbling of social traditions.” Since he realized that a “new kind of American movie” was being made by filmmakers with a much more open course of dialogue between the filmmaker and the viewer, filmmakers felt they were subject to fewer restraints and restrictions, simply exercising the will of the people. The Hays Code had been continually challenged through loopholes over the years and the emerging counter-culture seemed determined to throw it out altogether. He describes one instance where MGM tried to market the first major studio picture with nudity, which was denied by the PCA of California. The Supreme Court ruled in 1968 that states could constitutionally prevent children from seeing films but not adults. Filmmakers were becoming more brazen and thus, bad language and controversial images were becoming more common. Ultimately, the rating system had to be created in 1968 to take the place of the now-defunct Hays Code.

This is relevant to Sweet Sweetback’s Baadasssss Song because of the way it was marketed, rated, and ultimately distributed. The film received an X rating “by an all-whyte jury” (according to the film’s opening credits), which went along with the pornographic pretence director Melvin Van Peebles created during production in order to avoid trouble on the set of his controversial film. The rating system was still in its infancy in 1971 when the film was released and thus, many changes in the system were still being implemented. In 1970, the minimum age of admission to R-rated movies was raised from 15 to 16 while X-rated films remained at 17. The audience limitations set by this new system made it even harder for Van Peebles to get exhibitors to play his racy, independent film at first. Of course, the rampant success of the film changed all that, but the historical cinematic context in which Sweetback was released made its initial opening and distribution much tougher. Now, filmmaker's consider it a curse if their film receives the NC-17 rating (replacement for X), since very few papers advertise NC-17-rated films. Sweetback was the shining example of this and this article helps show the impact of the initial X-rating.  The film’s rating has since been changed to R.