Only after becoming Alaya did someone discover that humanity was still primitive. Meanwhile, Gaia was extraordinarily powerful and always liked picking on him. To get back at her, he resolved to guide human civilization toward the stars and free it from Gaia's control once and for all!
But he was clearly teaching primitive people to make fire, so how did those wild animals learn it too?! And how can a snap of the fingers make fire appear?! Hmm, using friction to generate heat and ignite a flame is very scientific, but your fingers not getting hurt at all is very unscientific!!
What! Snapping your fingers isn't enough for you anymore?! Now you want to make fireballs by rubbing your hands together? Oh no, has my civilization gone off the rails?!
(We have now entered the Age of the Gods.)
Key selling points:
The protagonist's development as Alaya is both similar to and different from the actual course of history;
Exploration and speculation about an unknown world;
Humanity's journey to becoming the dominant force on Earth, and even in the universe;
Some basic abilities from the Nasuverse and Hunter worlds are used as reference, then reworked to fit a unified system.