Its numberless legions of soldiers and zealots bludgeon their way across the galaxy, delivering death to anyone and anything that doesn’t adhere to their blinkered view of purity. Almost every man and woman toils in misery either on the battlefield – where survival is measured in hours – or in the countless manufactorums and hive slums that fuel the Imperial war machine. All of this in slavish servitude to the living corpse of a God-Emperor whose commandments are at best only half-remembered, twisted by time and the fallibility of Humanity.
Warhammer 40,000 isn’t just grimdark. It’s the grimmest, darkest.
The Imperium of Man stands as a cautionary tale of what could happen should the very worst of Humanity’s lust for power and extreme, unyielding xenophobia set in. Like so many aspects of Warhammer 40,000, the Imperium of Man is satirical.
https://www.warhammer-community.com/2021/11/19/the-imperium-is-driven-by-hate-warhammer-is-not/