Later this year—any day now really—the global population is projected to cross eight billion people. The United Nations recently pegged the date as Nov. 15, but we don’t know with any exact precision.
Since the 1960s, when the global number of people first hit three billion, it has taken a bit over a decade to cross each new billion-person milestone, and so it might seem natural to assume that nine billion humans and then 10 billion are, inexorably, just around the corner. That is exactly what the latest population projections from the U.N. and the U.S. Census Bureau have calculated.
But as we cross eight billion people, it is worth considering that the world might never make it to 10 billion, or even nine billion, and that the world’s major demographic problems won’t stem from the growing masses but from shrinking countries, aging populations and dwindling workforces.
We aren’t talking about meteor strikes, alien invasions or apocalyptic scenarios (though, of course, that could do it, too) but rather straightforward demographic projections that conclude that birthrates have been falling so rapidly around the world that we could potentially reach the peak of human population in less than a generation.
The U.N.’s projections are the best known. But an alternate set of projections has been gaining attention in recent years, spearheaded by the demographer Wolfgang Lutz, under the auspices of the Wittgenstein Centre for Demography and Global Human Capital at the University of Vienna, of which Mr. Lutz is founding director.
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Source: Wall Street Journal
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