In this breach all manner of documentary and feature films, from earnest biographies to goofy musicals, have tried to illuminate, not just this period of American history, but also the myriad ways in which humans react when faced with profound moral choices. The latest cinematic endeavor is a feature adaptation of “The Help,” a 2009 novel by Kathryn Stockett that has been on the best-seller list pretty much since its release and has been published in 35 countries.

Crucial to the novel’s success, just as it was in “Eyes,” was the narrative point of view. Hampton’s documentary slides powerfully from one witness to another, giving little-known organizers equal weight with the Dr. Kings and Rosa Parkses of the movement. Ms. Stockett, a white woman who toiled for five years on “The Help,” uses the voices of three women (Skeeter, an emerging white liberal writer, and Minny and Aibileen, two black maids she persuades to tell their stories) to telescope a wide range of emotions and experiences in the Jim Crow Mississippi of 1962. If Skeeter is Ms. Stockett’s stand-in, then she makes a bold stretch by using local dialect to voice the experiences of the black women, creating a false sense of authenticity that’s vital to the novel.