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So if Imperium is 1kk of worlds(even if 40kk or 600kk) then there is 99,99 of galaxy without Imperium presence. And if most of mankind navigation through stable warp tunnels so most of star systems are never visited.
So could be there another kingdom which doesn't connected to our? Like all their stable warp routs are nearby but never cross those which Imperium use.

Yes.

There are plenty of human worlds that are not connected to the Imperium, for the reasons you state. I find it unlikely that any of these empires (or whatever you want to call them) are as powerful or as widespread or as large as the Imperium. Sure, when you consider how vast the galaxy is it is technically possible, though the best I can come up with with is that what we know of the 40K universe it just isn't what the designers intended.


Also saying that the Imperium is made up of 1 million inhabited worlds just goes to show that numbers isn't Games Workshop's strong point. It's like the argument about there only being 1 million Space Marines in the whole of the Imperium. Sure, we can treat that as canon, but when you really think about it that few Space Marines is just an irrelevance in the galaxy wide scheme of things.

There could be, but it is unlikely a parallel civilization exists in the galaxy. The Imperium is very thinly spread, but it is very widely spread, and very paranoid. 10k years is easily enough to pick up radio signals or similar signs of other civilisations. Sublight probes are effective at such time scales. Also, there are species in the galaxy not constrained by stable warp routes (or at least not to the same degree): Aeldari, Orks, Tyranid, Necron, etc. It is highly likely these would have interacted with any other human civilisations and somehow caused the Imperium to become aware of them, but there is no evidence of this ever happening.

On the other hand, it wouldn't be out of the question for some future book to introduce the Neo-Interex or whatever and just handwave these issues. A galaxy is big enough to fit anything, and consistency was never the point of 40k.

It really depends on what you define as part of the Imperium. There's tons of stories of worlds that were at one point part of the Imperium, got cut off then rediscovered centuries later. At that point you have generations of independent evolution that while the Imperium considers part of the Imperium, could be considered a unique evolution of mankind.

I don't believe, however, that there are any examples of a pre-Emperor human civilization existing beyond Terra that would define it as a human civilization without Imperium roots.

Yes. There are.

The Imperium is only technologically and culturally stagnant. It’s otherwise surprisingly dynamic, with Rogue Traders tasked with seeking out new worlds for exploitation.

Sometimes it’s a relatively virgin world with no sapient life. Those? You can get cracking straight away. But there are still long lost outposts of humanity being found, other survivors of Long Night, or systems one part of but since severed from the Imperium.

Of those human worlds rediscovered? Could be Forgeworlds, Hive Worlds, Knight Worlds, Primitive Worlds etc.

That means there’s always some chance of discovering a world with a complete STC, which would potentially change the galactic status quo forever. Spesh if (and it’s not clear at the moment) a STC can make copies of itself.

The Leagues of Votann are basically another human society that operates on a similar scale to the Imperium.

There's bunches of them!

The Imperium usually brings them into the fold or steps on them when they're discovered, but they're out there. The Fantasy Flight RPGs dealt with that a lot - areas that used to be part of the Imperium and were recently re-accessed, with some wanting to return, some realizing that they didn't have the resources to fight back, and some outright resisting. There's secessionist movements as well, although those tend to get jumped on very quickly if the Munitorum can spare the manpower, and that's without getting into Chaos-following civilizations like the Sanguinary Worlds. It's been a while, but I'm pretty sure I remember Caine having a chuckle with another commissar about how the promises the Imperium offers 'border worlds' to get them to join peacefully are totally different from Tau propaganda and they mean them, honest they do, would the ambassador just go over there and tell lies?

Besides orks, the Imperium's most frequent enemy is simply other humans.

El Torro wrote:

Also saying that the Imperium is made up of 1 million inhabited worlds just goes to show that numbers isn't Games Workshop's strong point.

This is one of the few times GW has been correct when it comes to numbers.

The IoM is meant to be borderline insignificant in true galactic terms, that is the point.

Knight World's are allies with the Imperium, not its subjects.