SamuelDelaney looks at it with SystemsThinking : http://www.nyrsf.com/racism-and-science-fiction-.html
Let me reiterate: Racism is a system. As such, it is fueled as much by chance as by hostile intentions and equally the best intentions as well. It is whatever systematically acclimates people, of all colors, to become comfortable with the isolation and segregation of the races, on a visual, social, or economic levelwhich in turn supports and is supported by socio-economic discrimination. Because it is a system, however, I believe personal guilt is almost never the proper response in such a situation. Certainly, personal guilt will never replace a bit of well-founded systems analysis.