40k: The plan of the emperor of mankind would have never worked

The Emperors Dream:

1. Capture plan Earth ( Success )

2. Gain back control of the solar system. ( Success)

3. Conquer the galaxy ( middling success )

4. Gain access to a separate dimension to move all of humanity into. ( Massive failure )

5. Conquer all of humanity and move them into said dimension and starve out the Gods of Chaos. ( massive failure )

6. Create a race of uber humans so that you can finally have friends to hang out with and an eternal human utopia with mind science ( mild success )

7. Maybe come back to the galaxy and kill all other life in the galaxy. ( Middling success )

Why the emperors dream would have always failed even if he got everything he wanted:

1. Super boomer who experienced all of human history:

You know how you have these old people around who want you to believe that their social views from the time when it was okay to backhand a wife for being late with dinner is as valid as your view that we shouldn't be violent towards one another without being attacked first?

Well the Emperor is that boomer on steroids, but his views of what's normal are distorted by lifestyles lived as far back as when Kings were torture purging entire kingdoms in the middle ages and calling it the divine and righteous wrath of God.

2. He has never actually experienced a life lived another someone superior to him:

He is the peak of mankind since the day he was born and running for the last 30-50000 years. The only friends he ever made were a bunch of other immortals who all he had a falling out with and his only friend left from that group is the one who accepts himself as inferior to the Emperor and his plans.

The moment this man would have gotten his superior human better than him he would have despised him and probably turned against him.

Even worse, imagine when the superior human tells the emperor he was and is wrong. The emperor would have acted against his own species desire to grow beyond the Emperor. Every superior human that disagreed with the Emperor would have been declared a failure and the Emperor would have gone back to creating his "Superior man".

I believe this is the case because "The Custodes", the emperor exemplary example of a superior being, all are genetically modified humans completely incapable of disagreeing with the Emperor of Mankind.

3. The Emperor is the anti-thesis of God Emperor Leto II from Dune, and Leto's plan was the one that worked:

God Emperor Leto's plan was to become the villain of the story, to abuse humanity to such an extent over the course of 10,000 years that they become genetically coded to spread forever infinitely, so that they could never again be captured under the grip of a single leader, no matter how great or how far willing to grow his empire. Humanity would be too widespread to ever fall under the control of a single despot.

This plan worked in the end.

The Emperor's plan is the exact opposite, to capture every single human alive and add them to his empire. Anyone unwilling to join or willing to rebel would be killed off. This plan obviously suffered from too much centralization, where humanity collapsed towards the path of extinction the moment the Emperor of Mankind died. His plan was too dependent on him to ever succeed.

4. Who even is a human in the setting? :

One of the core requirements of the Emperor's plan to work was that he had to bring all of humanity under his fold, for if any human civilization remained free, Chaos would be able to take back control over the galaxy and humanity over time through them.

The problem here is that the Emperor of Mankind made up his own definition of who counts as a human.

The squats for example do not count as a human. Yet one could argue that they are human enough for the Chaos Gods to get their claws into humanity one day through them if they wished to. Such as the Squat outposts of Necromunda.

There is also the factor that just because the Emperor came up with his own definition of what counts as human doesn't mean it fits in with what the chaos Gods can use to empower themselves under the category of human.

For all we know half the humans that do not even count as abhumans due to the extremes of genetic alteration over time would still count as humans for the purposes of the Chaos Gods.

The only way to guarantee that the Emperor has all humans across the galaxy under his control would be to cleanse every single lifeform in the galaxy that does not count as human, to avoid any mistakes of accidentally leaving a human race behind.

5. It would have been impossible to get all humans under one single banner anyways:

Humanity spread across the galaxy vai the use of warp gates, holes in space time that allow for super fast travel using heck as a detour to ones destination.

The issue is that warp gates are not stable and can shut down and open up in new places over the course of thousands of years.

For all we know, there are hundreds to thousands of smaller human civilizations spread across the galaxy that are no longer reachable as there is no warp access point to travel to them anymore. The Emperor of Mankind and the imperium would have never been able to reach these civilizations to get them back into the Imperium of Mankind no matter how powerful they became.

6. We already have a successful impossible to exterminate species in the Galaxy of 40k which acts as an example of a solution that works:

Yes. That's right. The Orks.

They are the only species in the galaxy that have existed for millions of years and show no signs of ever going extinct even now.

The Orks are genetically modified biological weapons that are a self replicating ecosystem in each individual growing 24/7 due to the release of spores from their bodies and keep improving in combat as long as the fight gets harder or they are faced with a greater adversary without dying out in one hit.

The Orks also love fighting so much that they would go far and wide looking for a fight. If a good scrap was available at the other end of the galaxy that's where they would go, leaving behind Ork ecosystems all along the way.

So the winner in the 40k galaxy in terms of survival is:

A) A species that constantly adapts to the fight

and

B) Is forever spreading out across the galaxy

and

C) Has a high reproductive rate to make up for any and all losses.

The Orks are the "Go forth and multiply species of 40k"

The Orks are humanity after it escaped from the confines of God Emperor Leto II's control.

All the Emperor had to do to win was to conduct a "forever crusade" spreading out across the galaxy beyond even his ability to control it.

The Imperium of mankind would have won if instead of being centralized they were decentralized as a society while still doing all the shit that they did, actively encouraging everyone to get as far away from the center as humanly possible.

The imperium and humanity would have survived as long as they considered anything capable of reproducing with their fellow man as human.

The humans would have survived as long as they would have exiled all the psykers they found outside the borders of the Imperium instead of killing them.

Instead the God Emperor of Mankind homogenized the species to the point that a single bad glitch in the system could crash the entire system.

Conclusion:

The imperium of mankind could never have escaped the chaos Gods, the only remaining winning strategy was to accelerate the dispersal of humans across the Galaxy to such extremes and varieties of cultures that even Chaos could never hope to control all of them.

There would never emerge a perfect human utopia, but so would there never be a single extinction event to take down the entirety of mankind. The God Emperor of Mankind should have Leto II maxxed.