The tier of the world pretty much decides how much energy the world possesses to birth high-level beings such as the Divine tier.
But, is correlated to how much energy a galaxy has to begin with.
Some worlds can even evolve into higher planets by either absorbing other planets' Aether core or by completing certain hidden conditions the universal system has set. (The world that's been through Aetherization is also granted sentience.)
Some galaxies only have 10 million Heaven Tier beings and like 20 saints. So, galactic energy is vital to a planet's and the inhabitant's growth.
W-1
This is the lowest-tiered world that only births Mortal-tier beings frequently and a few Earth-tier beings every few thousand years.
There are very few Earth-tier beings in this world. Let's face the music, if it even had one, these Mortal guys are cannon fodder in intergalactic wars. Grunts so to speak.
W-2
(Yeah, this world hires mfs so it can take your tax money. So, go ahead and fill out your W-2 forms right now.)
This world is pretty much mortal central. Quite a few planets birth mortal tier. With a few thousand being Earth tier. And bruh, heavenly tier? Not even 10. Get over it :/
W-3
Oh yes, daddy. These worlds give birth to hundreds of Earth-tier beings, a couple of thousand Heavenly, and you've guessed it, like 7 Saints 🤣
W-4
Bro just take the math. It's simple. My fingers hurt typing this. Not really.
Bro, at this point, damn near everyone is Earth tier. These mofos are like Friezas. Born hella strong but requires no training.
They have millions of Heaven-tier beings and do you think Divine tier beings are like cabbages on the street? Listen up, Buster. They're not.
Damn near once every 10 million years a Divine level being is born (I'll get the number later on.) Divine tiered beings are the perfection of their respective race. You can say they're gods but not really.
Lots of beings like to call themselves gods but aren't. They're just hella strong.
Disclaimer: These numbers do not mean there are currently that many in one world. It's throughout how long that world had been in Aetherization.
My definition of "world" in this book is pretty much galaxy. I'll say planet if I'm talking about that specific place.
And one last thing, depending on how blessed the planet is by the universe, depends on the size expansion of that planet and galaxy during the aetherization period.
For example, the future Earth in the book is at least, a hundred times bigger than our current one.