This essay talks about
reasons for writing multicultural science fiction. It's not bad. But really? If you need an article like this in the first place, it's probably not going to help much. The really good futurists have no trouble looking at a diverse world and envisioning a diverse future, or peeling off slivers that are something other than the currently fashionable powerbase. Consider
Firefly, for instance. That's one of the most chromatically plausible futures I've seen, despite the fact that my crisis litany ends with "... and thank the gods we don't live in a universe scripted by Joss Whedon."