Journalist Isabel Wilkerson (Aunjanue Ellis-Taylor) was moved by the Trayvon Martin case to consider racism-in America, and abroad, throughout history-as a product of societal caste systems. The case studies she considered in Nazi Germany, India, and the U.S., as well as the personal tragedies she faced as she approached her book, fuel Ava DuVernay's ambitious read on Wilkerson's "Caste: The Origins of Our Discontents." Jon Bernthal, Vera Farmiga, Niecy Nash, Audra McDonald also star. 135 min. Widescreen; Soundtrack: English.