Worldwide, there is a 50 percent chance that the population will be falling by 2070, according to a recent study published in Nature. By 2150, according to one U.N. projection, the global population could be half what it is today.
Those who predict a coming Asian Century have not come to terms with the region’s approaching era of hyper-aging. Asia will also be plagued by a chronic shortage of women in the coming decades, which could leave the most populous region on Earth with the same skewed sex ratios as the early American West. Due to selective abortion, China has about 16 percent more boys than girls, which many predict will lead to instability as tens of millions of “unmarriageable” men find other outlets for their excess libido. India has nearly the same sex-ratio imbalance and also a substantial difference in birth rates between its southern (mostly Hindu) states and its northern (more heavily Muslim) states, which could contribute to ethnic tension.
Birth rates are falling dramatically across Latin America, especially in Mexico, suggesting a tidal shift in migration patterns. Consider what happened with Puerto Rico, where birth rates have also plunged: Immigration to the mainland United States has all but stopped despite an open border and the lure of a considerably higher standard of living on the continent. In the not-so-distant future, the United States may well find itself competing for immigrants rather than building walls to keep them out.