Spectrum not binary. Technically given the arc beween the nile and mesopotamia,

Spectrum not binary. Technically given the arc beween the nile and mesopotamia, there is local neotenic variation on predictable grades from the afroasiatic (arabian peninsula) to the egyptian to the levantine to the syrian to the anatolian to the caucuses to the iranics and down into the mesopotamians and back down to the afro asiatics. (When I worked on speciation among amerindians and the pattern was obviously a repetition of the middle east.)
The agrarian revolution led to massive migratory recombination and the bronze age accelerated it.
The late bronze age collapse in the eastern mediterranean was a result of the western and southern expansion of indo europeans – mostly counter-clockwise around the black sea – mostly around 4000 bc. By 3000 BC the corded ware (what we think of european) culture had formed and this was the origin of the major pressure point as they moved graduallya cross europe, and by 2400-2300 or so their conquest of europe was complete. So, by the bronze age collapse (1200bc) “The expansion of WSHs resulted in the virtual disappearance of the Y-DNA of Early European Farmers (EEFs) from the European gene pool, significantly altering the cultural and genetic landscape of Europe.”

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