One absolute stroke of genius which Rick Priestley and the other founders of Warhammer 40'000 hit upon, was to present the new setting through the propaganda lense of its evil space empire.
40k was birthed with satire and dark comedy being part of its intricate worldbuilding, and the cheeky artwork of the
Rogue Trader era showed Imperial Space Marines (
40k's posterboy crowd pullers from the very start) in a less noble light than has been common from 2nd edition and onward.
Although many subtleties of the original vision may naturally have had a hard time to shine through in the collective endeavour of decades of background writing (see
Waaagh The Emperor!), I still find that core parts of the original vision are alive and kicking in the newer background written for the Horus Heresy series.
As is evident in these three reminders:
The
Interex,
Diasporex and
Auretian Technocracy.
All of which did perfectly fine before the Great Crusade crushed them.
Interex Sagittar by byrdworx
And whose existence also hints at other, as of yet unrevealed brighter pockets of human survivors from the Age of Strife. The early Imperium did not just conquer hopeless post-apocalyptic human societies, and ones enslaved by aliens.
The early Imperium killed all alternative paths of human development in their cradles, locking mankind fully to the false duality of Emperor and Chaos. A dual choice which seems all the more rigged given the revelation of the Emperor's Faustian deal with the Chaos gods.
Considering how the Interex, Diasporex and Auretian Technocracy were introduced through the Horus Heresy novels, we can see that the strong Imperial propaganda angle of the setting's background is still hale and healthy, although those who miss these nuances amid the marketable heroic pauldrons can easily be forgiven, as it were.
The Imperium never were the only viable alternative for the future of humanity.
In fact, the technologically and scientifically regressive Imperium of Man is an obvious dead end. It cannot withstand the Necrons or Tyranids barring a miracle involving the technology of human ancestors, and thus Imperial mankind is doomed.
Which is proper grimdark, and thus right for the setting (unlike the fan-popular vision of a cruel but justified Imperium being the only option for human survival, which isn't grimdark enough).
Descendant Degeneration
The Imperium is going down like the Romans/Byzantines went down in the Middle Ages: Overwhelmed and outclassed technologically, in spite of their unlikely long run of clinging to empire through ability to adapt and organize; and in spite of their strong defenses, sophisticated
grand strategy, inherited ancient professionalism and science, dogged stubborness, faith and occassional strokes of good luck.
With this in mind, grab some popcorn and dice, as we duke out this decaying colossus' rage, rage against the dying of the light, tongue-in-cheek and bonkers as the founding fathers of Warhammer 40'000 intended.