Cheated? I Haven't gotten that deep but it seems interesting to me also that The Vedas and Hinduism are also connected here- This adds another layer of intrigue and also leads to a possible explanation of the vedic root of more global transmission of "civilisation".
You know about the god Maya from india who it seems left India and ended up in.... Yep, South America and possibly founded the Mayan civilisation (much Indian iconography ie St Augustin etc) Ive heard it mentioned that Greece was also a Vedic culture which now makes sense too. So all roads lead to India and Sumaria.
The zoroastrian attemp at monotheistic religion it seems, is fundamental to where we are today and possibly survived and spread due to geographic location. 
Is now a good time to mention ET's and Vimanas? :)
I will look into the Avesta now for sure, thanks