Isabel Wilkerson's Caste: The Origins of Our Discontents argues that America is best understood not through the lens of race or class but through the concept of caste. Wilkerson, who won the Pulitzer Prize for The Warmth of Other Suns, compares American racial hierarchy to the caste systems of India and Nazi Germany, finding structural parallels that illuminate all three. She identifies eight pillars of caste that maintain hierarchy across cultures, including divine sanction, inherited status, and control over marriage and reproduction. The book moves between personal narrative, historical analysis, and contemporary reporting, with Wilkerson sharing her own experiences of caste-based mistreatment alongside stories of others. Her comparison of American racism to India's treatment of Dalits and Nazi treatment of Jews is provocative, generating both praise and criticism. Supporters find the caste framework clarifying; critics argue it obscures the specificity of each system. Wilkerson writes with the storytelling skill that distinguished her earlier work, making complex arguments accessible through human stories. Caste became a phenomenon, selected for Oprah's Book Club and sparking national conversation. Essential reading for anyone seeking new frameworks for understanding American inequality and the persistence of racial hierarchy.