"Dark matter as a metaphor offers us an interesting way of examining blacks and science fiction. The metaphor can be applied to a discussion of the individual writers as black artists in society and how that identity affects their work. It can also be applied to a discussion of their influence and impact on the sf genre in general. While the "black sf as dark matter" metaphor is novel, the concept behind it is not. The metaphor is neither farfetched nor uncommon if one considers popular themes within the black literary tradition. An excellent example is Ralph Ellison's Invisible Man (1945), a novel that introduced the idea of black invisibility...It is my sincere hope that Dark Matter will help shed light on the sf genre, that it will correct the misperception that black writers are recent to the field, and that it will encourage more talented writers to enter the genre."