Why artificial multi-cultural multi-ethnic societies won't last forever

I would say that the human nature is universal and then culture and geography create variations and genetic adaptations in the way universal human nature is expressed.

Culture and geography feed back and change some of the genetic traits of human nature to better enhance the the penultimate purpose of it all, which is survival and reproductive success (in the ongoing ultimate goal of material life evolving all the way to supermaterial Godhood.)

Culture can also be instinctive, like language, and not merely a creation prompted by the outside environment. Religion too is inborn and part of basic human nature, we instinctively seek social bonding in religious answers to chaos, or now with political ideologies---it helps us survive better.

So different ethnic groups develop genetic variations from adapting to living in different geographies and climates and therefore develop variations on the cultures they create. These ethnic differences don't change much when living in modern, artificial, multi-cultural multi-ethnic societies, no-matter how much propaganda is thrown at us about how we are all the same.

Competition and civil disruptions then naturally develop in multi-cultural multi-ethnic societies largely do to those old ethnic genetic variations in the way universal human nature is expressed. That is why ethnostates and an ethnopluralism of ethnostates appear to be the most natural and harmonious sociopolitical form for human beings to live within.

The main problem in establishing a natural ethnopluralism of ethnostates is the few elite who gain financial and political global power by promoting border-less multi-cultural multi-ethnic societies, no-matter how much social disharmony they bring to the many.

But these artificial multi-cultural multi-ethnic societies won't last forever because, as E. O, Wilson said, "The genes hold culture on a leash. The leash is very long, but inevitably cultural values will be constrained in accordance with their effects on the human gene pool."