Malthusian catastrophe

A Malthusian catastrophe, sometimes known as a Malthusian check, is a return to subsistence-level conditions as a result of agricultural (or, in later formulations, economic) production being eventually outstripped by growth in population. Theories of Malthusian catastrophe are very similar to the subsistence theory of wages. The main difference is that the Malthusian theories predict over several generations or centuries whereas the subsistence theory of wages predicts over years and decades.

Traditional views

In 1761, Robert Wallace published Various Prospects of Mankind in which he argued that progress would eventually undo itself by overstocking the world with people. Thirty-seven years later, Thomas Malthus published his now famous Essay on the Principle of Population. In it, he predicted that population growth would eventually outrun food supply. This prediction was based on the idea that population, if unchecked, increases at a geometric rate, whereas the food supply could only grow at an arithmetic rate. Mathematically, any increasing geometric sequence (e.g. 1, 3, 9, 27, 81) will eventually overtake all arithmetic sequences (e.g. 10, 20, 30, 40, 50). The resulting decrease in food per person will eventually lead to subsistence-level conditions. According to Malthus, the catastrophe can only be prevented by self-restraint or vice—which for him included contraception and abortion.

Related Topics:
1761 - Thomas Malthus - Geometric rate - Geometric sequence - Arithmetic sequence - Contraception - Abortion

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Malthus did not give a time frame for his catastrophe. Thus far, population growth has been essentially geometric as Malthus predicted. The Malthusian catastrophe, however, has not occurred, principally because food supply growth has also been roughly geometric, not arithmetic. Furthermore, the widespread use of contraception and abortion (Malthusian vices) have, as Malthus said they could, restrained population growth significantly. In fact, currently, food supply per person is several times higher than when Malthus wrote his essay.

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