I'm reading Horus Rising (the first book in the Horus Heresy series) and the Luna Wolves are on their great expedition to reunite the galaxy and quash the primitive beliefs of the worlds they're taking over.

There are a few sections where they describe how fearlessly atheist they are.

Are they being naive or are they forgetting the Chaos Gods? It's my understanding that the four brothers were responsible for sabotaging the Primarch Project so the Imperium must know of their existence?

  • 3
    Hopefully as you have worked through the series this has made more sense to you :) The series starts with the Emperor stamping out all reigion including the worshiping of himself. But pretty soon the Chaos gods manage to manipulate the traitor legions to encourage belief
    – Richard C
    Jul 26, 2018 at 10:37

1 Answer 1


This is the Horus Heresy, the 30K - there is no God Emperor and the ruling ideology is the Imperial Truth - rationalistic, atheistic view that Emperor tried to create to starve Chaos Gods from believers.

Simply speaking, at this stage of the Great Crusade no one heard about Chaos Gods and eventual meeting with demons was described as meeting "very dangerous xenos" (and in all fairness it was possible - the Nephilim race, while unrelated to Chaos were mental parasites feeding on their worship). Well "no one"... except the Emperor of course. He decided that "ignorance is blessing" and the "Fearless atheism" will protect his armies from falling into worship of the Ruinous Powers. He was so sure of his plan, that when Word Bearers started to worship him, he punished them harshly... which pushed their primarch Lorgar (who was always looking for something bigger than himself) to search for something else that will listen to his prayers.

As for the primarch project: Chaos gods didn't show up in person to sabotage it, but instead they created warp vortex in the secret laboratory (and, if you believe the "False Gods" novel, in the heart of this vortex was Horus himself, still not fully corrupted at this stage), so it was looking like an accident to the very few, who knew about this.

Just as a side note: even in the "present" times, not all chapters (i.e. Space Wolves) treat Emperor as god - yes, he is a great person, father to them all, worth a worship like you'd worship a great hero... but not a god.

  • And even in 40k the Inquisition try to suppress all knowledge of the Chaos Gods, though they have to leave the Astartes mostly alone to keep the hoards back.
    – OrangeDog
    Nov 17, 2022 at 17:19

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