At the moment, we do have a few short stories (unpublished) that talk about events of a few ages prior that shape the psyche of some of our Races.
But I do like what you're suggesting here! I'll see what I can do in that regard! :)
They don't have to be huge stories--1000 words would be more than enough--and that would be enough to help flesh out the different races, compare and contrast. Besides, without that, much of the time, players act as just "humans in alien costumes," and while they may come from different cultures, but they otherwise seem to take up the same motivations.