Last week, WGBH News Senior Investigative Reporter Phillip Martin led a panel discussion in his series “Caste in America,” speaking with Mittal Institute Director Tarun Khanna, alongside Suraj Yengde, Laurence Simon, Kavita Pillay, and Swami Venkataraman, about the role of caste in the United States. Martin’s series “explores the discrimination Indian immigrants face in the United States as a result of this ancient hierarchical system of human classification,” with this particular segment evolving to encompass a study of caste in general, touching on its impact in other countries and its relationship to race.