I personally think that R1b people didn't invent agriculture, pottery, writing, city-states, and many other important early inventions or developments. Actually I've always claimed that R1b people didn't invent agriculture and that they didn't spread the Neolithic to Europe, going completely against the current of the vast majority of "professional" population geneticists, as well as from bloggers like Dienekes or Davidski.
R1b surely acquired agriculture from its Middle Eastern neighbours to the south (Levant). The only place where R1b might have spread the Neolithic is to the Pontic-Caspian steppes. But even there agriculture played only a minor role due to the harsh climate, and cattle and goat/sheep herding was the main means of subsistence. Hence my assumption that R1b might have domesticated these animals, as R1b was in the right region (eastern Anatolia) at the time and someone had to bring these domesticates to the steppes, so who better than R1b ?
I also never say that they invented burial customs ! The new data I mentioned in the OP seems to point that the kurgan (tumulus) type of burial, i.e. the one undeniably associated with the steppe cultures and later Indo-European migrations, might well have originated in the Middle East (not necessarily with the R1b people who exported the practice to the steppes). In any case, there are plenty of types of burial practices, and the most impressive were those of the Megalithic people (mostly G2a and I2) of Western Europe and of the ancient Egyptians (mostly E1b1b, G and T).
But as far as bronze working is concerned, I do see a link with R1b. Indo-European languages are not an invention, and they are undeniably spoken mostly by R1a- and R1b-dominated societies nowadays.
As for the horse domestication, as I said, R1a played as much a role as R1b, and there were probably some G2a3b1 among them as well.
Frankly, I don't care. It's not a battle, and I am not on anybody' side, R1b or other.
The first civilizations arose in the late Bronze Age. I agree that they were composite of many haplogroups. However Göbekli Tepe was not a civilisation, perhaps not even a culture, merely a settlement. At that time (Mesolithic to early Neolithic), most human populations were still living in tribes of closely related individuals. Hunter-gatherers may have settled down at Göbekli Tepe, but they were still a large extended family, primarily belonging to one haplogroup.
But Göbekli Tepe was not the only such settlement, and it is likely that all haplogroups present in the Fertile Crescent played their role in the Neolithic development. Agriculture arose in the Levant, domestication in the Taurus and Zagros mountains, and pottery appears to have first be made in Northeast Asia, then was diffused westward through Siberia. All were originally developed by different haplogroups. Actually even domestication could be attributed to different haplogroups depending on the animal.
On the other hand, there was probably precious little hg I in the region at the time. The present-day I2 found in Kurdistan almost certainly came with R1a from Eastern Europe (perhaps via Central Asia) during the Bronze Age or later. On the other hand, R1b has always been part of the Middle Eastern landscape at a reasonably high frequency (+10%).
You don't seem to understand that the R1b people who lived in the Middle East 7,000 or 10,000 years ago share very little autosomal DNA with the R1b people of modern Europe. I have explained at length before (e.g.
here) that R1b men constantly blended with local population (read women) on their long journey from the Middle East to Western Europe via the North Caucasus, Pontic Steppes, Balkans and Central Europe. I actually think that the original Mesolithic/Neolithic R1b carried autosomal genes that would fit better in the West Asian or Gedrosian admixtures in Dienekes' Dodecad Project.
Besides, you are not representative of the Y-haplogroup you carry. Whatever their haplogroup, people whose ancestors all come from the same region are more autosomally similar with one another than they are with geographically distant people who share the same haplogroup.
