The article explores how William Faulkner’s later novels portray the idea of the American interior — not just as a physical setting, but as a space where personal identity, commercial culture, and social history intersect. Skinfill argues that in Faulkner’s later work, the American South and its interior spaces become sites where traditional identities are challenged by commercial and cultural change after the Civil War and into the 20th century. The essay analyzes how Faulkner uses literary form and narrative technique to rethink Southern identity amid social displacement and market pressures. It examines the tension between history, commerce, and individual self-understanding in Faulkner’s storytelling, showing how interior worlds reflect larger cultural transformations.