the population crisis will be most likely be averted, the only reason why there has been a boom in population growth is because living standards of living is much higher then they where 70 years ago. with the downfall of the US and the European powers, the standard of living with deteriorate, as such welfare will be non existent and people will be forced to get jobs just to pay for food and other products that are need to sustain life. this will also help in the over weight problem in America and across the globe. hmmm funny how things seem to work themselves out.
Nothing personal, but I believe this is complete fallacy.
The population crisis will be averted not because of the fall of the US or Europe, but rather beacause having many children puts too much of a strain on a family.
Years ago, a child could go to school a few years, then enter the workforce quickly. Now, it takes 18-25 years for a child to economically support themself.
Also, the US will not fall within next 150 years. It simply has:
1. A power-house of an economy.
2. The world's most powerful military. (by a long shot)
3. Complete control of the world's oceans
4. No powerful opponents. (China is in no place to oppose the US)
And, the population crisis isn't even a crisis at all.
The United States has a population density way below that of the worlds average and can support far more people than it already has.