As a member of the 8.23 billion-strong human community, you probably have an opinion on the fact that the global population is set to hit a record high of 10 billion within the next few decades. Chances are, you’re not thrilled about it, given that anthropogenic climate change is already battering us and your morning commute is like being in a hot, jiggling sardine-tin.
Yet according to Dean Spears and Michael Geruso, academics at the University of Texas, what we really need to be worried about is depopulation. The number of children being born has been declining worldwide for a couple of hundred years. More than half of countries, including India, the most populous nation in the world, now have birthrates below replacement levels. While overall population has been rising due to declining (mainly infant) mortality, we’ll hit a peak soon before falling precipitously. This apex and the rollercoaster drop that follows it is the eponymous “spike”.
