Why do poor people have the highest birth rates?
It seems that regardless if it is the poor of the 3rd world nations or the poor of the developed world, the worse-off people end up having more kids, on average, than the stable and well-off people.
Even in America, it seems like the poorest people have the most kids and then you see all these professionals, successful and smart people with no kids or only one child. What is going on here?
This question is in the General Section. Responses must be helpful and on-topic.