Few issues today are as divisive as what is called the "world population problem." With the approach this autumn of the International Conference on Population and Development in Cairo, organized by the United Nations, these divisions among experts are receiving enormous attention and generating considerable heat. There is a danger that in the confrontation between apocalyptic pessimism, on the one hand, and a dismissive smugness, on the other, a genuine understanding of the nature of the population problem may be lost.(1)
Visions of impending doom have been increasingly aired in recent years, often presenting the population problem as a "bomb" that has been planted and is about to "go off." These catastrophic images have encouraged a tendency to search for emergency solutions which treat the people involved not as reasonable beings, allies facing a common problem, but as impulsive and uncontrolled sources of great social harm, in need of strong discipline.
Such views have received serious attention in public discussions, not just in sensational headlines in the popular press, but also in seriously argued and widely read books. One of the most influential examples was Paul Ehrlich's The Population Bomb, the first three sections of which were headed "Too Many People," "Too Little Food," and "A Dying Planet."(2) A more recent example of a chilling diagnosis of imminent calamity is Garrett Hardin's Living within Limits.(3) The arguments on which these pessimistic visions are based deserve serious scrutiny.
If the propensity to foresee impending disaster from overpopulation is strong in some circles, so is the tendency, in others, to dismiss all worries about population size. Just as alarmism builds on the recognition of a real problem and then magnifies it, complacency may also start off from a reasonable belief about the history of population problems and fail to see how they may have changed by now. It is often pointed out, for example, that the world has coped well enough with fast increases in population in the past, even though alarmists had expected otherwise. Malthus anticipated terrible disasters resulting from population growth and a consequent imbalance in "the proportion between the natural increase of population and food."(4) At a time when there were fewer than a billion people, he was quite convinced that "the period when the number of men surpass their means of subsistence has long since arrived." However, since Malthus first published his famous Essay on Population in 1798, the world population has grown nearly six times larger, while food output and consumption per person are considerably higher now, and there has been an unprecedented increase both in life expectancies and in general living standards.(5)
The fact that Malthus was mistaken in his diagnosis as well as his prognosis two hundred years ago does not, however, indicate that contemporary fears about population growth must be similarly erroneous. The increase in the world population has vastly accelerated over the last century. It took the world population millions of years to reach the first billion, then 123 years to get to the second, 33 years to the third, 14 years to the fourth, 13 years to the fifth billion, with a sixth billion to come, according to one UN projection, in another 11 years.(6) During the last decade, between 1980 and 1990, the number of people on earth grew by about 923 million, an increase nearly the size of the total world population in Malthus's time. Whatever may be the proper response to alarmism about the future, complacency based on past success is no response at all.
Immigration and Population
One current worry concerns the regional distribution of the increase in world population, about 90 percent of which is taking place in the developing countries. The percentage rate of population growth is fastest in Africa—3.1 percent per year over the last decade. But most of the large increases in population occur in regions other than Africa. The largest absolute increases in numbers are taking place in Asia, which is where most of the world's poorer people live, even though the rate of increase in population has been slowing significantly there. Of the worldwide increase of 923 million people in the 1980s, well over half occurred in Asia—517 million in fact (including 146 million in China and 166 million in India).
Beyond concerns about the well-being of these poor countries themselves, a more self-regarding worry causes panic in the richer countries of the world and has much to do with the current anxiety in the West about the "world population problem." This is founded on the belief that destitution caused by fast population growth in the third world is responsible for the severe pressure to emigrate to the developed countries of Europe and North America. In this view, people impoverished by overpopulation in the "South" flee to the "North." Some have claimed to find empirical support for this thesis in the fact that pressure to emigrate from the South has accelerated in recent decades, along with a rapid increase in the population there.
There are two distinct questions here: first, how great a threat of intolerable immigration pressure does the North face from the South, and second, is that pressure closely related to population growth in the South, rather than to other social and economic factors? There are reasons to doubt that population growth is the major force behind migratory pressures, and I shall concentrate here on that question. But I should note in passing that immigration is now severely controlled in Europe and North America, and insofar as Europe is concerned, most of the current immigrants from the third world are not "primary" immigrants but dependent relatives—mainly spouses and young children—of those who had come and settled earlier. The United States remains relatively more open to fresh immigration, but the requirements of "labor certification" as a necessary part of the immigration procedure tend to guarantee that the new entrants are relatively better educated and more skilled. There are, however, sizable flows of illegal immigrants, especially to the United States and to a lesser extent to southern Europe, though the numbers are hard to estimate.
What causes the current pressures to emigrate? The "job-worthy" people who get through the immigration process are hardly to be seen as impoverished and destitute migrants created by the sheer pressure of population. Even the illegal immigrants who manage to evade the rigors of border control are typically not starving wretches but those who can make use of work prospects in the North.
The explanation for the increased migratory pressure over the decades owes more to the dynamism of international capitalism than to just the growing size of the population of the third world countries. The immigrants have allies in potential employers, and this applies as much to illegal farm laborers in California as to the legally authorized "guest workers" in automobile factories in Germany. The economic incentive to emigrate to the North from the poorer Southern economies may well depend on differences in real income. But this gap is very large anyway, and even if it is presumed that population growth in the South is increasing the disparity with the North—a thesis I shall presently consider—it seems unlikely that this incentive would significantly change if the Northern income level were, say, twenty times that of the Southern as opposed to twenty-five times.
The growing demand for immigration to the North from the South is related to the "shrinking" of the world (through revolutions in communication and transport), reduction in economic obstacles to labor movements (despite the increase in political barriers), and the growing reach and absorptive power of international capitalism (even as domestic politics in the North has turned more inward-looking and nationalistic). To try to explain the increase in immigration pressure by the growth rate of total population in the third world is to close one's eyes to the deep changes that have occurred—and are occurring—in the world in which we live, and the rapid internationalization of its cultures and economies that accompanies these changes.