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Thomas Robert Malthus, after whom Malthusianism is named. Malthusianism is a theory that population growth is potentially exponential, according to the Malthusian growth model, while the growth of the food supply or other resources is linear, which eventually reduces living standards to the point of triggering a population decline.
At one lecture, he condemned drunkenness and prostitution as alienating, degrading, and impoverishing. Although he was sometimes identified as a socialist, his solution to the problem was decidedly Malthusian in advocating birth control, which he would defend to the end of his life. Wicksell has been described as an "ardent neo-Malthusian." [4]
The book An Essay on the Principle of Population was first published anonymously in 1798, [1] but the author was soon identified as Thomas Robert Malthus.The book warned of future difficulties, on an interpretation of the population increasing in geometric progression (so as to double every 25 years) [2] while food production increased in an arithmetic progression, which would leave a ...
Malthusian models have the following form: = where P 0 = P(0) is the initial population size, r = the population growth rate, which Ronald Fisher called the Malthusian parameter of population growth in The Genetical Theory of Natural Selection, [2] and Alfred J. Lotka called the intrinsic rate of increase, [3] [4]
The neo-Malthusian controversy, comprising related debates of many years later, has seen a similar central role assigned to the numbers of children born. [27] The goal of Malthusian theory is to explain how population and food production expand, with the latter experiencing arithmetic growth and the former experiencing exponential growth. [28]
Theory of population may refer to: Malthusianism, a theory of population by Thomas Malthus (1766–1834) An Essay on the Principle of Population, the book in which Malthus propounded his theory; Neo-Malthusian theory of Paul R. Ehrlich (born 1932) and others; Theory of demographic transition by Warren Thompson (1887–1973)
Boserup is known for her theory of agricultural intensification, also known as Boserup's theory, which posits that population change drives the intensity of agricultural production. Her position countered the Malthusian theory that agricultural methods determine population via limits on food supply .
Following the death of his father in 1907 he became Secretary of the Malthusian League and served as its President 1912 until 1952 (its demise). In 1914 he met Margaret Sanger who became a strong influence on his views. [3] In both 1921 and 1925 he served as President of the Neo-Malthusian International Conference (London, 1921: New York, 1925).