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5 - The Formation of New Demographic and Ecological Structures

Published online by Cambridge University Press:  05 June 2012

Charles H. Parker
St Louis University, Missouri
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The ways in which human societies have provided for themselves, whether it was the hunting and gathering strategies of native tribes in North America or the extensive cereal agriculture of peasants in China or the seasonal whaling expeditions of coastal communities in Siberia, have exacted a toll on their physical landscapes. Settled agriculture, the caloric basis of all civilizations around the world, makes exacting demands on natural ecosystems and imposes drastic changes on virgin terrains. Despite the destructive environmental effects that sometimes accompanied large-scale crop cultivation, agriculture has without a doubt enabled human societies to grow at a prodigious rate, allowing for much more concentrated population densities than were otherwise possible.

The practice of extensive agriculture throughout history, however, has not freed human populations from their fragile relationship with natural habitats. At the end of the eighteenth century, Thomas Malthus, an English clergyman and economist, identified clearly the limits of agriculture in his influential treatise, “An Essay on the Principle of Population.” Malthus argued that societies based on agriculture will always tend to outgrow their food supply. According to the Malthusian calculus, “population[s], when unchecked, increased in a geometrical ratio, and subsistence for man in an arithmetical ratio.” That is, humans reproduce at a much greater rate than their capacity to produce food and thus at regular intervals stand at the brink of their own destruction.

Publisher: Cambridge University Press
Print publication year: 2010

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