It seems likely that no film since Spike Lee's "Do the Right Thing" has gotten so many moviegoers talking about the history of race and racism in America as has this summer's hit "The Help," which was adapted by writer-director Tate Taylor from his old friend Kathryn Stockett's best-selling novel. The contrast between the two is instructive, if not alarming. Lee's film was set in its own present tense, on the racially polarized streets ...