What exactly may have been going on in 3100bce which essentially spelled the end of Sumerian dominance. While Ur I was Sumerian, we suddenly see Ur II emerge less than a hundred years later as a Semite dynasty and so the mighty Sumerians essentially loose all military/political power for the rest of time.
the sumerians saw themselves as gods
they thought that their blood was from the gods
they saw everyone else as men and as a resource
it was for this reason that during sumerian rule semites were not placed in positions of power
this also explains the idea that the sumerian gods made man from the blood of a defeated god and clay
clay in the context of "local building material"
the local building material available for making humans in mesopotamia was the conquered semitic ubaidians
but you can see the problem
the sumerians came from the north in small numbers and settled in a land of semites who had large numbers
this neccesitated them creating a slave race to build their monuments for them
eventually the semites outbred them as the sumerians had rules about who was worthy for marriage and making babies
even Enlil was banished to the underworld for a while for raping a human (Ninlil)
http://etcsl.orinst.ox.ac.uk/cgi-bin/et ... p1#t121.p1
the fact that the Sumerians regarded themselves as godly is well attested
the fact that the semites regarded them as gods has been hidden behind millenia of religious redaction
but at the end of the day
the great flood was sent in the earliest stories by Enlil
the Hebrews calls him YWHW
the Christians call him Jehova
the Moslems call him Allah
but he is the same deity all the way through from the beginning
how can you argue with that
i dont see anyone arguing that Jehova and the Christian bible is not based on the hebrew version with YHWH
you have to be very naieve not to see this simple fact
or you have to have faith to ignore it
Have the Gutian Hordes been identified as any particular group
i heard that they were the proto Elamites
the aryans were not a racial group
they were a religious group
Hitler seems to have clouded that issue quite badly
as did early colonialism
http://en.wikipedia.org/wiki/Aryan_Inva ... roversies)