The cause of these failures is not the size or shape or configuration of the society and population, but rather the failed experiment of having a private central bank issue all the public currency as a loan at interest. This is, by design, an economic system that creates debt faster than it can create money with which to pay that debt. Dy design, total indebtedness always increases, a fatal design flaw masked by the phrase "economic growth", as if to imply such increasing debt is a good thing.
As a result, the system of a private central bank issue all the public currency as a loan at interest must eventually transfer the real assets of the people into the hands of the bankers, while leaving the people holding paper notes which must eventually inflate to worthlessness (as is happening even now in the United States). Collapse then follows, as is happening in Europe.
Without exception, every nation engaging in private central banks issuing all the public currency as a loan at interest have ultimately been destroyed by it, yet politicians, beholding to those very same private central banks, and fearful of standing up and putting the blame where it belongs, and instead search for scapegoats, usually some variation of "It's all the fault of the people."