So where should I start, the same boring classical theory of how universe was created,

Naaaa! No thanks.

I'm pretty sure everyone already heard it plenty of times.

Anyway

In the realm we are about to delve is in a era of vast expanse, beings as massive as megladon sharks roaming the land, birds as big as a T-rex.

Imagine you are going for a hike on a mountain trail, and suddenly a eagle as big as a bomber diving right towards you, or a super massive snake slithering towards you. That's would be quite an adventure wouldn't it.

Now you probably thinking humans are still in their monkey period, sorry to break your dreams.

Monkeys are monkeys and humans are humans.

so, how would they survive, well they are not cultivators taking pills or some magician with wands, or some other common fantasy.

Nein folks!

It's their extent of thoughts and thinking capabilities which have set the humans apart from other beings, whether through use of tools or tactics, or another strength delving deep within or subconscious mind.

As mentioned before, through concentrating on oneself ( Simply put, by trying to stop their thoughts from wandering) humans achieved remarkable feats in both knowledge about their surroundings and further ahead achieved some supernatural talents.

Some achieved levels where they were literally became godly beings among those who were not able to control their own minds.

As the achievements of humans brought more secure settlements and resources to live in leisure, so became their minds muddled in useless thoughts like feeling jealousy, anger and greed while looking at others. It didn't stop at one person but it's in everyone. Stagning the potential growth everyone might have achieved.

Wow! what a disaster( in Sarcasm)

Better that way, otherwise these humans would have turned their entire homeland into a trash can.