An Essay on the Principle of Population
A foundational work on population growth and resource limits.
The book warned that population tends to increase geometrically while food production increases arithmetically, leading to famine unless birth rates decrease.
- field
- Demography, Economics
- author
- Thomas Robert Malthus
- known_for
- Malthusian Law of Population, geometric vs. arithmetic growth
- key_influence
- Cited by Charles Darwin and Alfred Russel Wallace in developing natural selection
Lore & Background
Malthus wrote the original text in reaction to the optimism of his father and associates such as Rousseau, and as a response to William Godwin and the Marquis de Condorcet. He argued that population growth constantly presses against food supply, causing distress, lower wages, and poverty. The book described preventive checks (birth control, delayed marriage) and positive checks (hunger, disease, war) that hold population within resource limits. Malthus proposed gradual abolition of poor laws, arguing they raised commodity prices and undermined independence. He defended his concern for the poor, writing that increasing demand for agricultural labor and produce would naturally support population growth, while other attempts were 'vicious, cruel, and tyrannical.'
Reader's Guide
An Essay on the Principle of Population remains a cornerstone of demographic and economic thought. Its warning that population growth can outstrip food supply influenced debates on poverty, welfare, and resource management. Its Malthusian Law of Population—linking population growth to lower wages and poverty—sparked lasting controversy. Critics such as William Farr and Karl Marx argued Malthus underestimated human capacity to increase food supply, though Malthus himself noted humans' unique power to greatly increase means of subsistence. The work's influence on Darwin and Wallace shows its reach beyond economics into biology. Neo-Malthusian models today apply its logic to global population and historical dynamics.
Frequently Asked Questions
Who is An Essay on the Principle of Population?
It is a 1798 treatise by Thomas Robert Malthus that became a cornerstone text in both demography and economics. The work laid out a systematic framework for understanding how human population dynamics interact with the limits of available resources.
What are An Essay on the Principle of Population's powers/role?
Its central claim—now called the Malthusian Law of Population—argues that people multiply geometrically while food output only grows arithmetically. Malthus insisted this structural mismatch inevitably produces famine, disease, or conflict unless birth rates are voluntarily checked.
How does An Essay on the Principle of Population's story end?
The essay closes by asserting that, absent moral restraint or other preventive checks, population will always press against the ceiling of available sustenance. Malthus frames this not as a temporary crisis but as a permanent tension between human reproduction and agricultural capacity.
Why is An Essay on the Principle of Population important?
Beyond its immediate impact on economic and demographic thought, the book's logic of struggle for limited resources was explicitly cited by both Charles Darwin and Alfred Russel Wallace as a key intellectual spark behind the theory of natural selection. It remains a reference point whenever scholars debate carrying capacity and resource scarcity.
What field does An Essay on the Principle of Population belong to?
The work sits at the intersection of demography and economics, examining how population size relates to the means of subsistence. It is generally regarded as one of the earliest systematic treatments of population dynamics as an economic variable.
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