The article mentions Japan.
I was reading quite some time ago where the birth rate is getting so low in areas that there are nothing but senior citizens around. Towns are being abandoned from no population. On and on like that.
Could happen here if low birthrate occurs. I understand now that retirees are gaining in number over other ages in this country.

The same thing's happening in Europe. The native population isn't reproducing enough to replace those dying and they kill so many of their own babies in the womb that they are having to allow hordes of uneducated immigrants in to fill the jobs. Uneducated immigrants that hate them and their governments and lifestyles.
Karmic payback is a b*tch.
European Caliphate anyone?