The novel's focus on how the system of slavery shapes its central characters dramatizes society's power to construct raced identities. The reader witnesses the development of Rufus from a relatively decent boy allied to Dana to a "complete racist" who attempts to rape her as an adult. Similarly, Dana and Kevin's prolonged stay in the past reframes their modern attitudes. Butler's depiction of her principal character as an independent, self-possessed, educated African-American woman defies slavery's racist and sexist objectification of black people and women.