The Neolithic of West Eurasia started, by most accounts, c. 12 thousand years ago. Its origin was in the area framed by the Armenian Plateau in the north, the Anatolian Plateau in the west, the Zagros Range in the east, and the lowlands of southern Mesopotamia and the Levant in the south. Intriguingly, the prehistoric site of Göbekli Tepe sits right at the center of this important area, in eastern Anatolia/northern Mesopotamia.
If there is a candidate for where the ur-population that became the modern Six lived, the early Neolithic of the Near East is surely it. This hypothesis makes the most sense chronologically, archaeologically, genetically, and geographically.
Migrants out of the core area would have spread their genes in all directions, becoming differentiated by a combination of drift, admixture, and the selection pressures they faced in different natural and cultural environments; some of them would acquire lighter pigmentation, others lactase persistence, malaria resistence, the ability to process the dry desert air or to survive the long winter nights of the arctic. These spreads were sometimes gradual, sometimes dramatic: they took place over thousands of years and from a multitude of secondary and tertiary staging points.
In Arabia, the migrants would have met aboriginal Arabians, similar to their next door-neighbors in East Africa, undergoing a subtle African shift (Southwest_Asians). In North Africa, they would have encountered denser populations during the favorable conditions of MIS 1, and by absorbing them they would became the Berbers (Northwest_Africans). Their migrations to the southeast brought them into the realm of Indian-leaning people, in the rich agricultural fields of the Mehrgarh and the now deserted oases of Bactria and Margiana. Across the Mediterranean and along the Atlantic facade of Europe, they would have encountered the Mesolithic populations of Europe, and through their blending became the early Neolithic inhabitants of the Mediterranean and Atlantic coasts of Europe (Mediterraneans). And, to the north, from either the Balkans, the Caucasus, or the trans-Caspian region, they would have met the last remaining Proto-Europeoid hunters of the continental zone, becoming the Northern Europeoids who once stretched all the way to the interior of Asia.
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