One of the youngest recipients of a MacArthur "genius" grant, Kara Walker, an African American artist, is best known for her iconic, often life-size, black-and-white silhouetted figures, arranged in unsettling scenes on gallery walls. These visually arresting narratives draw viewers into a dialogue about the dynamics of race, sexuality, and violence in both the antebellum South and contemporary culture. Walker's work has been featured in exhibits...