I think Earth was always where it is now. And there might have been ice ages and polar shifts and meteorites and all that. But never a God.
First we had a whole bunch of Gods. Big gods for big things and mini gods for mini things. That was hard to control, Gods got mixed up and people start making there own Gods and people start to act as Gods...it got messy.
So the world leaders back then, not to be confused with Gods, made up this kick ass plan.
They created 1 God and 1 God only who is all into love and thy may not hurt one another but at the same time they made sure we were all scared as fuck for this 1 God.
To know the complete story about this scary motherfucker you should read the old testament. Let me tell you, that is one book filled with the most scary stupid ass motherfucking people hating bullshit you will ever read!
It's scary!
And that's how you control the masses...make them believe in a scary dude they cannot see. or hear. Or feel. But he is their!
Make rules how to live and give them "The Holy Book"
That's just my point of view...