Section 2
Population Growth
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Implications of Different Rates of Growth
Different rates of growth can lead to overpopulation or underpopulation, both of which have potential consequences.
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Three Demographic Variables
The basics of demographic population growth depend on the rate of natural increase (births versus deaths) and net migration.
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Problems in Forecasting Population Growth
Population growth is difficult to predict because unforeseen events can alter birth rates, death rates, migration, or resource limitations.
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Malthus' Theory of Population Growth
Malthus believed that if a population is allowed to grow unchecked, people will begin to starve and will go to war over increasingly scarce resources.
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Demographic Transition Theory
Demographic transition theory outlines five stages of change in birth and death rates to predict the growth of populations.