Minerals! The invaders had virtually wiped out our entire race for minerals. But then, who were we to complain, when for centuries elements of mankind had wiped out other races and peoples over oil, land and space, and differing beliefs about the hereafter? It was chilling to think we had anything in common with an alien race implementing genocide, but perhaps they were doing on a galactic scale what we had -- at least so far -- confined to our own species. In another hundred years, perhaps two-hundred, would we have been exporting our own prejudices across the cosmos? We would never know, now that humanity had been all but erased.