[Cronos]

There's a time sequence that correlates with an Eastward movement. The oldest stuff was developed further West.

The "oldest stuff" as you put it, IS the Rig Veda and no, it wasn't developed anywhere NEAR Mesopotamia -- as Mesopotamia had it's own mythos (as I keep repeating, the Enuma Ellish) which doesn't relate in any way to Aryanic ethos or the tales in the Rig Veda.

There are also little inclusions that come from other sources

I asked you for examples.

[muawiyah]

I do believe you've forgotten that the guys who invented writing in Mesopotamia were neither Indo-European nor Turcic, nor Semitic.

In fact, the closest ancient cognate languages to Sumerian are DRAVIDIAN, and the closest modern languages to Sumerian are Sa'ami (which have a large input of words from another non-Indo European language group in North Asia).

Their "beliefs" were a tad different than the standard Indo-European "god set", and were decidedly different than anything developed by the neighboring Semites.

What you have to do is go back another millenia and things will become much more familiar. Otherwise we'd have to believe that the Dravidians who penetrated Mesopotamia 7 to 10 thousand years ago managed to cast off all their own cultural baggage to embrace beliefs which would not be invented for another 4000 or so years.

There's been a lot of back and forth movement from Punjab to Helsinki over the ages. The Aryans who acquired domesticated horses used them to track back to where local stories indicated they kept the good stuff.