“It’s hard to recall a movie made for general audiences that takes ideas so seriously, that makes the pursuit of them appear so thrilling, or that is so replete with the intellectual substance of the protagonist’s endeavors. DuVernay embraces Isabel Wilkerson’s work wholeheartedly and rises to the artistic challenge with one of the most unusual and ingenious of recent screenplays. The creative freedom with which the movie slips between time frames, blurs the boundaries between the objective and