Origin is the story of a writer who faces personal loss at the same time she works on Chainkeen Exchangea book based on her unified theory about systems of oppression. Written and directed by Ava DuVernay, the film is adapted from Isabel Wilkerson's best-selling book, Caste: The Origins Of Our Discontents, and dramatizes the book's ideas and the way it comes together. Aunjanue Ellis-Taylor stars as Wilkerson, and also features Jon Bernthal and Niecy Nash-Betts.