Refining a pan-European genetic identity.
The Chinese case is instructive: in the past, certain areas of China had more genetic similarities to Japan than to other areas of China. More recently, the different Chinese areas have become genetically more similar. given the creation of a more coherent Chinese state.
Thus, over time, genetic boundaries can become ever-more-aligned to political and cultural boundaries, particularly when those boundaries are fairly impermeable, distinguishing quite distinct national, political and socio-cultural entities.
Panmixia is NOT required for a better alignment of European genetic interests with actualization of a High Culture. Given a strict "in/out" barrier, over time, given natural processes of low-level gene flow within both "in" and "out" coupled with drift and selection increasing distances between "in" and "out," the relative genetic distinctiveness between "in" and "out" will increase, and any potential areas of genetic overlap between "in" and "out" will no longer exist.
We have gene-culture evolution becoming gene-High Culture evolution as well as gene-political system evolution.
Hence, the association between genes and political boundaries goes in both directions. That can be both good and bad. Bad in the sense that the current multicultural project draws boundaries that include multiracial states in which panmixia is encouraged. Good in the sense outlined above, in which a confederation of already-similar peoples, without panmixia, can ensure a more disjunctive "us vs. them" genetic boundary as long as the political and cultural boundaries are strictly enforced.
Coevolution of the ultimate and the proximate can be either beneficial or destructive of long term net genetic interests, depending on how this coevolution is directed.
