Part of the background for the King Roach series (at least in the version in this 2003 sketchbook) is ancient, lost empire. History has forgotten it. It was powerful and, basically, fundamentally, corrupt and evil. It had the sort of advanced technology that looks like magic to pre-industrial cultures. Tiny pockets of tech staffed by former citizens of the empire (kept in stasis) lay hidden in unexplored pockets of the world. Woe to anyone who pokes about in those pockets.