No relation to the later Ralph Bakshi semi-animated feature of the same name, Cool World is set in the meanest sections of Harlem. Hampton Clayton plays Duke, a powerful street gang member who claims that he is motivated by the Black Muslim movement. His subsequent criminal activities are thus not merely for gain, but as a means to declare black supremacy over the white establishment. One of director Shirley Clarke's few mainstream projects, Cool World was the first commercial film venture to be shot on location in Harlem. The largely unknown cast features future luminaries (and husband and wife) Clarence Williams III and Gloria Foster.
~ Hal Erickson, All Movie Guide