Boserup, Ester. 1965. The Conditions of Agricultural Growth: The Economics of Agrarian Change under Population Pressure. Chicago: Aldine.Google Scholar
Boserup, Ester. 1970. The interrelation between population trends and agricultural methods in Economic Development and Population Growth. Edited by H.P. Lexington, Gray and S. S. Tangri, pp.66–70. Cambridge, MA: D.C. Heath.Google Scholar
Boserup, Ester. 1975. The impact of population growth on agricultural output. Quarterly Journal of Economics 89:257–70.CrossRefGoogle Scholar
Boserup, Ester. 1976. Environment, population and technology in primitive societies. Population and Development Review 2:21–36.CrossRefGoogle Scholar
Boserup, Ester. 1981. Population and Technological Change: A Study of Long-Term Trends. Chicago: University of Chicago Press.Google Scholar
Boserup, Ester. 1985. Economic and demographic interrelationships in sub-Saharan Africa. Population and Development Review 11:383–97.CrossRefGoogle Scholar
Boserup, Ester. 1999. My Professional Life and Publications 1929–1998. Copenhagen: Museum Tusculanum Press, University of Copenhagen.Google Scholar
Bronson, Bennett. 1972. Farm labor and the evolution of food production in Population Growth: Anthropological Implications. Edited by B. Spencer, pp. 190–218. Cambridge, MA: MIT Press.Google Scholar
Bronson, Bennett. 1975. The earliest farming: Demography as cause and consequence in Population Ecology and Social Evolution. Edited by Steven Polgar, pp. 53–78. The Hague: Mouton. Republished in Origins of Agriculture (1977). Edited by C.A. Reed, pp. 23–48. The Hague: Mouton.Google Scholar
Caldwell, John C. 1998. Malthus and the less developed world: The pivotal role of India. Population and Development Review 24:675–96.CrossRefGoogle Scholar
Childe, V. Gordon. 1936. Man Makes Himself. London: Watts.Google Scholar
Coale, Ansley J. 1974. The history of human population. Scientific American 321:41–51.Google Scholar
Cohen, Mark Nathan. 1977. The Food Crisis in Prehistory: Overpopulation and the Origins of Agriculture. New Haven: Yale University Press.Google Scholar
Darby, H.C. 1956. The clearing of the woodland in Europe in Man's Role in Changing the Face of the Earth, Vol. 1. Edited by W.L. Thomas, Jr, pp. 183–216. Chicago: University of Chicago Press.Google Scholar
Darity, William A. Jr. 1980. The Boserup theory of agricultural growth: A model for anthropological economics. Journal of Development Economics 7:137–57.CrossRefGoogle Scholar
Deevey, Edward S. Jr. 1960. The human population. Scientific American 203:195–203.CrossRefGoogle Scholar
Dixon, R.M.W. 1997. The Rise and Fall of Languages. Cambridge: Cambridge University Press.Google Scholar
Dupâquier, J., A. Fauve-Chamoux, and E. Grebenik (eds.). 1983. Malthus: Past and Present. London: Academic Press.Google Scholar
Hopkins, A.G. 1973. An Economic History of West Africa. London: Longman.Google Scholar
Iversen, Johs. 1949. The Influence of Prehistoric Man on Vegetation. Copenhagen: Danish Geological Bureau. Publication No. 6.Google Scholar
Lee, Ronald Demos. 1986. Malthus and Boserup: A dynamic synthesis in The State of Population Theory: Forward from Malthus. Edited by D. Coleman and R. Schofield, pp. 96–130. Oxford: Basil Blackwell.Google Scholar
Malthus, Thomas Robert. 1959. The First Essay. Edited by Kenneth E. Boulding. Ann Arbor: University of Michigan Press. Essay first published 1798.Google Scholar
Malthus, Thomas Robert. 1960. A summary view of the principle of population in On Population: Three Essays. New York: New American Library, pp. 13–59. Slightly abridged version of 1824 supplement to Encyclopaedia Britannica.Google Scholar
Malthus, Thomas Robert. 1989. Principles of Political Economy. Edited by John Pullen. Cambridge: Cambridge University Press. First published 1820.Google Scholar
Myrdal, Gunnar. 1968. Asian Drama: An Inquiry into the Poverty of Nations. 3 Vols. London: Allen Lane.Google Scholar
Narr, Karl J. 1956. Early food-producing populations in Man's Role in Changing the Face of the Earth, Vol. 1. Edited by W.L. Thomas, Jr, pp. 134–51. Chicago: University of Chicago Press.Google Scholar
Renfrew, Colin. 1987. Archaeology and Language: The Puzzle of Indo-European Origins. London: Jonathan Cape.Google Scholar
Ricardo, David. 1817. Principles of Political Economy and Taxation. London: John Murray.Google Scholar
Sauer, Carl O. 1956. The agency of man on the earth in Man's Role in Changing the Face of the Earth, Vol. 1. Edited by W.L. Thomas, Jr, pp. 49–69. Chicago: University of Chicago Press.Google Scholar
Simon, Julian. 1981. The Ultimate Resource. New York: Blackwell.Google Scholar
Stewart, Omer C. 1956. Fire as the first great force employed by man in Man's Role in Changing the Face of the Earth, Vol. 1. Edited by W.L. Thomas, Jr, pp. 115–133. Chicago: University of Chicago Press.Google Scholar
Thomas, William L. Jr. (ed.). 1956. Man's Role in Changing the Face of the Earth, Vol. 1. Chicago: University of Chicago Press.Google Scholar
Wrigley, E.A. 1986. Elegance and experience: Malthus at the bar of history in The State of Population Theory: Forward from Malthus. Edited by D. Coleman and R. Schofield, pp. 46–64. Oxford: Blackwell.Google Scholar
Malthus vs Boserup
Holly Story sizes up two theories of population growth
Humans, like members of all populations of plants and animals, are in competition with one another for the Earth’s resources. The global human population is growing at a rate of around 1.2 per cent per year, and as it does the competition for resources increases.
One of those resources is food. In high-income countries food supply is relatively secure; Britain has not experienced a widespread food shortage since the Second World War. But as demand for food increases, supplies come under greater pressure. In 2012 a drought in the USA caused a drop in the global production of maize, and the effects were felt around the world as the prices of staple foods such as bread increased. In the future will we be able to produce enough food to support the ever-increasing human population?
While this seems like a 21st-century problem, it is actually a question that has concerned economists for hundreds of years (and farmers since the first days of agriculture).
In the 18th century an economist called Thomas Robert Malthus wrote an essay outlining his response to the problem. The work, entitled ‘An Essay on the Principle of Population’ (1798), set out Malthus’s theory of population growth: a theory of how and why the size of the population would change.
Malthus thought that if the human population continued to grow, food production would not be able to keep up with demand and there would not be enough food to go around. The result, he warned, would be a terrible famine that would kill many people.
In ecological terms, Malthus was arguing that the human population was at risk of outgrowing its carrying capacity (the number of individuals that can be supported by a specific habitat). There are examples of this happening to particular populations of animals and insects, such as the reindeer on St Matthew Island.
Malthus reasoned that this disastrous outcome could only be avoided if the population stopped growing. He described two types of ‘checks’ that could stop population growth: a negative check that would cause a drop in the birth rate (e.g. increased use of contraceptives) and a positive check that would increase the death rate (e.g. disease or war). These checks, he argued, were more likely to take effect as the population got closer to its carrying capacity, either because governments would take steps to stop the population getting any bigger or because of increased competition and hardship within the population. This, Malthus thought, was what would save us from large-scale starvation.
But the population has not stopped growing. Since Malthus’s lifetime the number of humans on the planet has continued to increase, and in 2011 the population reached 7 billion. According to Malthus’s theory, this should not have been possible. Where did he go wrong?
Malthus’s theory was based on the assumption that the population would grow exponentially (1, 2, 4, 8, 16, 32) whereas food production would grow linearly (1, 2, 3, 4, 5), much more slowly. At the time when he was writing the Industrial Revolution had not yet arrived, and without developments such as pesticides and fertilisers the amount of food that could be produced per acre of land was much smaller than it is today.
Over the 250 years since Malthus published his essay, advances in technology and innovations in farming methods have allowed food production to grow quickly enough that we can now, in theory at least, provide sufficient food for the world’s 7 billion inhabitants. Malthus did not account for these advances in his population theory, but another economist, Ester Boserup, did.
Ester Boserup (1910–1999) was a Danish economist who specialised in the economics and development of agriculture. She worked for the United Nations and her experience working in low- and middle-income countries such as India helped to shape her theory of the relationship between human population growth and food production.
In her work ‘The Conditions of Agricultural Growth: The economics of agrarian change under population pressure’ (1965), Boserup challenged Malthus’s conclusion that the size of the human population is limited by the amount of food it can produce. She suggested that food production can, and will, increase to match the needs of the population.
Drawing on her knowledge of farming in the developing world, where populations were growing quickly, Boserup argued that the threat of starvation and the challenge of feeding more mouths motivates people to improve their farming methods and invent new technologies in order to produce more food.
Boserup described this change as ‘agricultural intensification’. For example, a farmer who has four fields to produce food for his family might grow crops in three of the fields, but leave the fourth field empty as the ground is dry and his crop will not grow there. However if the farmer has two more children, the pressure to produce more food might drive him to build irrigation canals to bring water to the fourth field or to buy a different type of seed that will grow in drier ground. He would change the way he farms to make sure that he has enough food to support a larger family.
Is there a limit?
Boserup’s theory seems to provide a model for continuous population growth, but there are those who argue that Malthus was right and that there is a limit to the amount of humans the planet can support.
As modern environmentalists, scientists and politicians debate the future of the world’s climate and resources, we must hope that Boserup was right to believe that human beings are capable of remarkable ingenuity in the face of a problem.Lead image:
Wellcome Library, London CC BY
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Questions for discussion
- Can you find an example of an individual or a group that thinks Malthus was right? What are their arguments?
- Food is not the only resource that we need to survive. Can you think of other resources that humans compete for? What would happen if they ran out?
About this resource
This resource was first published in ‘Populations’ in June 2014.
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