The size of the world’s population has profound implications for demand for food, energy and resources, land use change and greenhouse gas emissions. This study examines why most population projections have underestimated world population growth, and the implications for actions required to achieve ...
voluntary family planning provision and promotion achieved rapid fertility decline, even in poor, rural and illiterate communities.
I'd assumed that family planning was more quickly adopted in wealthier areas where people had greater expectations that their kids would survive. Interesting to learn that that's not necessarily true.