In particular:
"Demographers, who had been watching the exponential rise with alarm, now forecast that the population will peak below ten billion—ten gigapeople—not long after 2050. Such a low forecast would have been unthinkable just two decades ago. Already, in developing countries, the number of children born per woman has fallen from six to three in 50 years. It will have reached replacement-level fertility (where deaths equal births) by 2035.
This is an extraordinary development, unexpected, undeserved—and apparently unnatural. Human beings may be the only creatures that have fewer babies when they are better fed. "
