Population, when unchecked, increases in a geometrical ratio. Subsistence only increases in an arithmetical ratio.

Thomas Robert Malthus

More information about this quote

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Original Citation

Malthus, Thomas [published anonymously]. An Essay on the Principle of Population. London: J. Johnson, 1798, ch. 1.

Current Citation

Malthus, Thomas. "An Essay on the Principle of Population." An Essay on the Principle of Population and Other Writings, edited by Robert Mayhew. Penguin Classics, 2015, ch. 1.