Earlier quoted context omitted.
This wealth is based on social cohesion, which can fall apart in a generation or two. Genghis conquered half of Asia and built an empire of great wealth and high culture, but lack of cohesion tore it apart not long after.
I think there is a better (though still rather disanalogous) comparison between the US with the decline of the Roman Republic into the Principate. Some of the same arguments apply to the EU. In both cases a large (and roughly similar) number of people with different cultural splits (Red & Blue/North & South European) are increasingly feeling like their governmental structures are failing to represent them. Perhaps X0…
It's interesting. The US, and I assume the EU, has a mechanism for solving this. Simply devolve authority from the federal level to the state level. The states can, theoretically, better tailor solutions to their individual populace than the federal level can to the entire country.
However, things only seem to ever go the other direction. Maybe I just don't see the things that are devolved? Or does it genuinely just not really happen?
I suppose one could make an argument that marijuana legalization is an example of states taking back power from the federal government. They pass the laws regardless of the fact that it is still federally illegal and nothing is technically stopping the DEA from busting every single seller in, say, Denver for distribution.