The History of Fertility Transitions and the New Memeplex
4th November 2014
Only tiny pockets of culture that maintain extreme separation from the new pattern – especially through refusing outside education and preventing women from contact with the outside world – have fertility patterns plausibly consistent with uncontrolled fertility. These may include the Amish and Hassidim in the United States. Once the fertility transition to controlled fertility occurs in a population, its fertility generally continues to decline until it is below replacement. The benefits of the new pattern are increased material wealth per person, a reduction in disease, starvation, and genocide, and upward social mobility. The main drawback is the onset of a dysgenic phase that may end civilization as we know it.
I know a number of situations where four grandparents only have one grandchild, the only child of two only children.