You should try making the case for Warhammer 40000 being a very well-disguised eutopia rather than gothic cosmic horror.

Well, there are plenty of inhuman enemies that we can all feel good about brutally dismembering, and of course so much knowledge has been lost that Brennan would feel quite at home. The fluff mentions souls and reincarnation IIRC so you could argue that no-one is actually dying, and I suppose they might not feel pain as ... keenly ... as we do? It still seems hard to justify all those faceless masses being ground down into the dirt by oppressive dictatorships or tortured to death by faceless horrors from beyond the stars, but such is the price of heroism. Perhaps they're NPCs.