Oprah and Pulitzer Prize-winning writer Isabel Wilkerson discuss her newest work and Oprah’s Book Club pick, Caste: The Origins of our Discontents. In episode one of the eight part series, Oprah and Isabel consider the first pillar of Caste as outlined in the book, "Divine Will and the Laws of Nature.” Seventeen readers from all walks of life join in the discussion as Isabel answers questions about how God and religion were used to justify the caste system in the United States.