CityReads│How Human Tide has Shaped Our Modern World and Future?

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How Human Tide Has Shaped Our Modern World and Future? 

Rapid population acceleration and deceleration send shockwaves around the world and have shaped history and our future.

Paul Morland, 2019.The Human Tide: How Population Shaped the Modern World. New York: Public Affairs.

Darrell Bricker and John Ibbitson. 2019. Empty Planet: The Shock of Global Population Decline.  New York: Crown.

Zachary Karabell. The Population Bust: Demographic Decline and the End of Capitalism as We Know It. Foreign Affairs, 2019,98(5).

Source:https://www.foreignaffairs.com/reviews/review-essay/2019-08-

There are now some 7.6 billion people living on the planet. How has human population increased to such a scale? For most of human history, the world’s population grew so slowly that for most people alive, it would have felt static. Between the year 1 and 1700, the human population went from about 200 million to about 600 million; by 1800, it had barely hit one billion. Then, the population exploded, first in the United Kingdom and the United States, next in much ofthe rest of Europe, and eventually in Asia. By the late 1920s, it had hit two billion. It reached three billion around 1960 and then four billion around 1975. It has nearly doubled since then. It took 200,000 years for human species to reach the first billion but it only took 200 years to exceed 7 billion.

Just as much of the world has come to see rapid population growth as normal and expected, the trends are shifting again, this time into reverse. Most parts of the world are witnessing sharp and sudden contractions in either birthrates or absolute population. The only thing preventing the population in many countries from shrinking more quickly is that death rates are also falling, because people everywhere are living longer. These oscillations are not easy for any society to manage. “Rapid population acceleration and deceleration send shockwaves around the world wherever they occur and have shaped history in ways that are rarely appreciated,” the demographer Paul Morland writes in The Human Tide, his new history of demographics. Morland doesnot quite believe that “demography is destiny,” as the old adage mistakenly attributed to the French philosopher Auguste Comte would have it. Nor do Darrell Bricker and John Ibbitson, the authors of Empty Planet, a new book on the rapidly shifting demographics of the twenty-first century. But demographics are clearly part of destiny. If their role first in the rise of the West and now in the rise of the rest has been underappreciated, the potential consequences of plateauing and then shrinking populations in the decades ahead are almost wholly ignored.

The mismatch between expectations of a rapidly growing global population (and allthe attendant effects on climate, capitalism, and geopolitics) and the reality of both slowing growth rates and absolute contraction is so great that it will pose a considerable threat in the decades ahead. Governments worldwide have evolved to meet the challenge of managing more people, not fewer and not older. Capitalism as a system is particularly vulnerable to a world of less population expansion; a significant portion of the economic growth that has driven capitalism over the past several centuries may have been simply a derivative of more people and younger people consuming more stuff. If the world ahead has fewer people, will there be any real economic growth? We are not only unprepared to answer that question; we are not even starting to ask it.

Bomb or bust ?

At the heart of The Human Tide and Empty Planet, as well as demography in general, is the odd yet compelling work of the eighteenth-century British scholar Thomas Malthus. Malthus’ 1798 Essay on the Principle of Population argued that growing numbers of people were a looming threat to social and political stability. He was convinced that humans were destined to produce more people than the world could feed, dooming most of society tosuffer from food scarcity while the very rich made sure their needs were met.In Malthus’ dire view, that would lead to starvation, privation, and war, which would eventually lead to population contraction, and then the depressing cycle would begin again.

Yet just as Malthus reached his conclusions, the world changed. Increased cropyields, improvements in sanitation, and accelerated urbanization led not to an endless cycle of impoverishment and contraction but to an explosion of global population in the nineteenth century. Morland provides a rigorous and detailed account of how, in the nineteenth century, global population reached its breakout from millennia of prior human history, during which the population had been stagnant, contracting, or inching forward. He starts with the observation that the population begins to grow rapidly when infant mortality declines. Eventually, fertility falls in response to lower infant mortality—but there is a considerable lag, which explains why societies in the modern world can experience such sharp and extreme surges in population. When infant mortality begins to drop, it takes several generations before fertility does, too.

The population bust is going global

The burgeoning of global population in the past two centuries followed almost precisely the patterns of industrialization, modernization, and, crucially, urbanization. It started in the United Kingdom at the end of the nineteenth century (hence the concerns of Malthus), before spreading to the United States and then France and Germany. The trend next hit Japan, India, and China and made its way to Latin America. It finally arrived insub-Saharan Africa.

With the population explosion came a new wave of Malthusian fears, epitomized by the 1968 book The Population Bomb, by Paul Ehrlich, a biologist at Stanford University. Ehrlich argued that plummeting death rates had created an untenable situation of too many people who could not be fed or housed. “The battle to feed all of humanity is over,” he wrote. “In the 1970’s the world will undergo famines—hundreds of millions of people are going to starve to death in spite of any crash programs embarked on now.”

Ehrlich’s prophecy, of course, proved wrong, for reasons that Bricker and Ibbitson elegantly chart in Empty Planet. Yet visions of dystopic population bombs remain deeply entrenched, including at the center of global population calculations: in the forecasts routinely issued by the United Nations. The United Nations forecasts that our population will grow from seven billion to eleven billion in this century before leveling off after 2100. Judging from the evidence presented in Morland’s and Bricker and Ibbitson’s books, it seems likely that this estimate is too high, perhaps substantially. It’s not that anyone is purposely inflating the numbers. Governmental and international statistic alagencies do not turn on a dime; they use formulas and assumptions that took years to formalize and will take years to alter. Until very recently, the population assumptions built into most models accurately reflected what was happening. But the sudden ebb of both birthrates and absolute population growth has happened too quickly for the models to adjust in real time. As Bricker and Ibbitson explain, “The UN is employing a faultymodel based on assumptions that worked in the past but that may not apply inthe future.”

Except, argue Bricker and Ibbitson, those numbers and all the doomsday scenarios associated with them are likely wrong. As they write, “The great defining event of the twenty-first century—one of the great defining events in human history—will occur in three decades, give or take, when the global population starts to decline. Once that decline begins, it will never end. But an increasing number of demographers around the world believe the UN estimates are far too high. More likely, they say, the planet’s population will peak at around nine billion sometime between 2040 and 2060, and then start to decline.By the end of this century, we could be back to where we are right now, and steadily growing fewer. Populations are already declining in about two dozen states around the world; by 2050 the number will have climbed to three dozen. The largest developing nations are also about to grow smaller, as their own fertility rates come down. China will begin losing people in a few years. By the middle of this century, Brazil and Indonesia will follow suit. Even India, soon to become the most populous nation on earth, will see its numbers stabilize in about a generation and then start to decline”.

Morland, who, unlike Bricker and Ibbitson, is a demographer by training, is skeptical that humanity is on the cusp of a tectonic reversal in population trends. He agrees that the trends have changed, but he is less prone to the blanket certainty of Bricker and Ibbitson. This is not because he uses different data;he simply recognizes that population expectations have frequently been confounded in the past and that certainty about future trends is unreasonable.Morland rightly points out that even if fertility rates fall dramatically in Africa, there will be decades left of today’s youth bulge there. Because he is more measured in his assessment of the ambiguities and uncertainties inthe data, Morland tends to be more circumspect in drawing dramatic conclusions. He suggests, for instance, that China’s population will peak short of 1.5 billion in 2030 and then stagnate, with an aging population and gradual absolute decline thereafter. Bricker and Ibbitson, on the otherhand, warn that China’s fertility rate, already in freefall, could actually get much worse based on the example of Japan, which would lead China to shrink to less than 700 million people in the second half of the century. Morland does agree with Bricker and Ibbitson on one important point: when it comes to global population, the only paradigm that anyone has known for two centuries is about to change.

How will the population bust shape our future?

The implications of the coming population bust occupy a large portion of Bricker and Ibbitson’s book, and they should occupy a much larger portion of the collective debate about the future and how to prepare for it. The underlying drivers of capitalism, the sense that resource competition and scarcitydetermine the nature of international relations and domestic tensions, and the fear that climate change and environmental degradation are almost at a doomsday point—all have been shaped by the persistently ballooning population of the past two centuries. If the human population is about to decline as quickly as it increased, then all those systems and assumptions are in jeopardy.

Both books note that the demographic collapse could be a bright spot for climate change. Given that carbon emissions are a direct result of more people needing and demanding more stuff—from food and water to cars and entertainment—then it would follow that fewer people would need and demand less. What’s more, larger proportions of the planet will beaging, and the experiences of Japan and the United States are showing that people consume less as they age. A smaller, older population spells some relief from the immense environmental strain of so many people living on one finite globe. That is the plus side of the demographic deflation.

The downside is that a sudden population contraction will place substantial strainon the global economic system. Capitalism is, essentially, a system that maximizes more—more output, more goods, and more services. That makes sense, given that it evolved coincidentally with a population surge. The success of capitalism in providing more to more people is undeniable, as are its evident defects in providing every individual with enough. If global population stops expanding and then contracts, capitalism—a system implicitly predicated on ever-burgeoning numbers of people—will likely not be able to thrive in its current form. An aging population will consume more of certain goods, such as health care, but on the whole aging and then decreasing populations will consume less. So much of consumption occurs early in life.

But what happens when these trends halt or reverse? Think about the future cost of capital and assumptions of inflation. No capitalist economic system operates on the presumption that there will be zero or negative growth. No one deploys investment capital or loans expecting less tomorrow than today. But in a world of graying and shrinking populations, that is the most likely scenario, as Japan’s aging, graying, and shrinking absolute population now demonstrates. A world of zero to negative population growth is likely to be a world of zero to negative economic growth. It will completely upend existing financial and economic systems. The future world may be one in which capitalism at best frays and at worst breaks down completely.

The global financial system is already exceedingly fragile, as evidenced by the 2008 financial crisis. A world with negative economic growth, industrial capacity in excess of what is needed, and trillions of dollars expecting returns when none is forthcoming could spell a series of financial crises. It could even spell the death of capitalism as we know it. As growth grinds to a halt, people may well start demanding a new and different economic system. Addin the effects of automation and artificial intelligence, which are already making millions of jobs redundant, and the result is likely a future in which capitalism is increasingly passé.

So the demographic future could end up being aglass half full, by a meliorating the worst effects of climate change and resource depletion, or a glass half empty, by ending capitalism as we know it.Either way, the reversal of population trends is a paradigm shift of the firstorder and one that is almost completely unrecognized. We are vaguely prepared for a world of more people; we are utterly unprepared for a world of fewer.That is our future, and we are heading there fast.

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