>>54722296Historically, some of the real indicators of civilizational collapse are: population decline, running out of resources, and (a somewhat distant third IIRC) diversity to the point of lack of cohesion.
That said, I do think the opposite direction has its own unique hazards, which haven't really been historically tested before the present era.
Population density itself, being an average of bodies in some given territory, can be thought of as points on a manifold (or limits toward same); the closest practical approximation of a point, is a city district, or neighborhood unit. Bangladesh has multiple such districts in capital Dhaka, with the property that there are north of 100,000 bodies per square klick within those districts:
https://en.wikipedia.org/wiki/List_of_city_districts_by_population_densityThese "points" are the truly most densely populated surveyed locations on earth. The concept is dominated by four cities: Nairobi, Dhaka, Mumbai, and Surat. Hong Kong and Manhattan also make dents (building up = more bodies per ground area unit), but even so, they pale in comparison to the depth and, well opposite-of-breadth of the above surveyed units.
-resident of a 6500/km^2 neighborhood, a cultural shock from a previous rural area when I came here
