Question

Answer the following question

200 to 250 word minimum

3. What do you believe will be the single most important demographic issue with which the world must cope with over the next half-century, and how do you think this issue should be dealt with?

Answer 1

Population Growth Is Still The Biggest Problem Facing Humanity

Earth's population is approaching seven billion at the same time that resource limits and environmental degradation are becoming more apparent every day. Rich nations have long assured poor nations that they, too, would one day be rich and that their rates of population growth would decline, but it is no longer clear that this will occur for most of today's poor nations.

Resource scarcities, especially oil, are likely to limit future economic growth; the demographic transition that has accompanied economic growth in the past may not be possible for many nations today. Nearly 220,000 people are added to the planet every day, further compounding most resource and environmental problems. The United States adds another person every eleven seconds. We can no longer wait for increasing wealth to bring down fertility in remaining high fertility nations; we need policies and incentives to stop growth now.

Much has been written about population growth since the first edition of Malthus's famous essay was published in 1798. However, an underlying truth is usually left unsaid: Population growth on Earth must cease. It makes more sense for humans to bring growth to a halt by adjusting birth rates downward in humane ways rather than waiting for death rates to move upward as the four horsemen reappear. Those who think it inhumane to control human fertility have apparently never experienced conditions in Third World shanty towns, where people struggle just to stay alive for another day.

Both population and consumption are parts of the problem--neither can be ignored and both are exacerbating the human impact on Earth. More distressing, however, is that many among us don't even see that there are problems created by both growing populations and increasing affluence bearing down on a finite planet. To pretend that another 80 million people added to the planet each year is not a problem because they are all being added to the world's poor nations makes no sense at all. Many of them will end up in rich nations by migrating, legally or illegally, and all will further compound environmental problems, from strains on oil and other fossil fuel resources to deforestation and higher emissions of CO2 and other greenhouse gases. As Kenneth Boulding noted decades ago, "Anyone who believes that exponential growth can go on forever in a finite world is either a madman or an economist."

Population, consumption, and greenhouse gas emissions will continue to grow until we either face up to the fact that there are limits on our finite Earth or we are confronted by a catastrophe large enough to turn us from our current course. If Chinese, Indians, and others in the poorer world had consumption levels that rose to current western levels it would be like Earth's population suddenly increasing to 72 billion, according to Jared Diamond, who then wrote that, "Some optimists claim that we could support a world with nine billion people. But I haven't met anyone crazy enough to claim that we could support 72 billion. Yet we often promise developing countries that if they will only adopt good policies--for example, institute honest government and a free-market economy--they, too, will be able to enjoy a first-world lifestyle. This promise is impossible, a cruel hoax: we are having difficulty supporting a first-world lifestyle even now for only one billion people."

This promise is often made by people who believe that that alone will stop population growth via the demographic transition, conveniently forgetting about such exceptions as China. As Tom Athanasiou argued, in Divided Planet: The Ecology of Rich and Poor, "In a world torn between affluence and poverty, the crackpot realists tell the poor, who must live from day to day, that all will be well in the long run. Amidst deepening ecological crisis, they rush to embrace small, cosmetic adaptations."

The widespread acceptance and political influence of modern neoclassical economics is a central part of our global problem. In one widely used economics textbook, Principles of Economics, Greg Mankiw wrote that "A large population means more workers to produce goods and services. At the same time, it means more people to consume those goods and services." Speaking for many neoclassical economists, Tim Harford concluded, in The Logic of Life, that "The more of us there are in the world, living our logical lives, the better our chances of seeing out the next million years." The absurdity of Harford's statement must be recognized and challenged.

Future oil production will come at an increasing cost, if it comes at all. As Bill McKibbin noted, in Deep Economy: The Wealth of Comunities and the Durable Future, "Cheap and abundant fossil fuel [mainly oil] has shaped the farming system we've come to think of as normal; it's the main reason you can go to the store and get anything you want at any time and for not much money." More expensive oil will eat into world food production, especially if we continue to use foodstuffs to help fill gas tanks.

Scientists need to encourage a deeper and more realistic interest in population growth on a finite planet and its effect on many of the major issues of our time. We ignore the implications of further population growth at our peril. In 1971 Wilbur Zelinsky, in an article entitled "Beyond the Exponentials; The Role of Geography in the Great Transition," fretted that "The problem that shakes our confidence in the perpetuation and enrichment of civilized human existence or even our biological survival is that of growth: the rate, volume, and kinds of growth, and whether they can be controlled in intelligent, purposeful fashion."

Continued population growth is unsustainable, as is continued growth in the production of oil and other fossil fuels. As Lester Brown argued, in PLAN B: Rescuing a Planet Under Stress and a Civilization in Trouble, "If we cannot stabilize population and if we cannot stabilize climate, there is not an ecosystem on earth we can save." As Alan Weisman wrote, in The World Without Us, "The intelligent solution [to the problem of population growth] would require the courage and the wisdom to put our knowledge to the test. It would henceforth limit every human female on Earth capable of bearing children to one." Started now, such a policy would reduce Earth's population down to around 1.6 billion by 2100, about the same as the world population in 1900. Had we kept Earth's population at that level we would not be having this conversation.