so where is the root then ?  is it 10.000 bc or 10 ?

I am still curious as to when the genius of man sat down and said ...''what about this as an idea' then we can stop killing everyone and just convert them with fear and awe . 

Indeed if it is say egyptian empire times then obvious motives spring up...however if the roots of the idea can be traced to sumarian  or even cavemen ..then I am curious as to what happened in evoloution for an animal to make this assumption (which of course spread like wildfire across the globe ) but that said its uncanny that only one species can contemplate the idea....and here we are ....a lot further towards the actual godship.