This wasn't addressed to me and is the flip side of of the question raised in the OP, however, I'd like to respond.
As the earliest humans developed language abilities they used these new found skills to pass information on from generation to generation. At some point, they started wondering about the world around them and their existence. Where do we come from? Why do good people get sick and die? What happens to us when we die?
"Where do we come from" was addressed by every culture around the world. There are thousands of creation stories, none more or less compelling than those in the OT.
- If god (or gods) made everything, who/what made god/s? God (the gods) have always existed.
- Why do good people get sick and die? The ways of god (the gods) are indeed mysterious.
- What happens to us when we die? Good people join him in the clouds, bad people go into the fires of volcanoes.
God/s was used/were used to explain everything that "leaders" could not explain.
- What causes lightning? The gods are throwing mighty spears at each other.
- Why have the rains not come? God is angry with us.
- What can we do to appease god? Slaughter a lamb / sacrifice a virgin.
I could go on, but you get the idea. Thanks for asking.
This is an excellent statement which encapsulates the
real question which should be put.
The "origin of atheism" is almost an illogical question, because atheism is the
default condition for every human that comes into this world. Every baby is born knowing nothing about their world, nor anything about supernatural concepts. This is why the religions of the world consider it so vital to inculcate children at the earliest availability, in order to create good little Hindus, or Muslims, or Christians, etc. All the while ensuring themselves that
their brand of God worship is the 'correct' one, while others are deceivers and pretenders, of course!
No, the relevant question should be as to the origin of
theism, as Mr Ecco succinctly unravels, because without the introduction of god claims, there would not be those of us who reject those claims! There would be no atheists, just as there are no 'a-moon fairiests', or 'a-Saturnian dragonists'. Those last two terms don't exist, not because there are no people who don't believe in fairies on the moon or dragons on Saturn, but because there
are no people who do!
For my own, and to summarise and add to Mr Ecco, theism has arisen from a combination of our evolution and our evolution!
We have evolved to be pattern-seekers, even when no pattern exists, because it has proven prudent for us to so behave on the savannahs of Africa. We have also evolved to have brains large enough to ponder our origins and our inevitable deaths. The rest has been, literally, child's play.