The idea that, at some point in the future, humans will be unable to produce enough food to feed the ever-expanding population is called the .

Malthusianism

Explanation:

Malthusian catastrophe also called Malthusianism, Malthusian check, Malthusian spectre or Malthusian crisis was developed by Thomas Robert Malthus in his essay on "The Principle of Population". According to Malthus, malthusianism occurs when population growth is more than agricultural production.

He posited that the growth of population is exponential while the growth of food supply is linear. He said some checks such as delayed marriage and abstinence were put in place in order to keep population growth with the growth of food supply.

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