Part seven of Oprah’s discussion with Pulitzer Prize-winning writer Isabel Wilkerson and readers of the book, Caste: The Origins of our Discontents. The penultimate episode in the eight-part series focuses on the eighth and final pillar of Caste, "Inherent Superiority Versus Inherent Inferiority” which describes how the dominant caste were conditioned to believe that one group is superior and inherently deserving of the best in a given society. Isabel also explores why the dominant cast believes those deemed lowest are deserving of their plight.  David Holt, mayor of Oklahoma City, joins Oprah, Isabel and other guests to discuss how the caste system has impacted his city.