There are two versions of Thomas Robert Malthuss Essay on the Principle of Population. The first, published anonymously in 1798, was so successful that Malthus soon elaborated on it under his real name. * The rewrite, culminating in the sixth edition of 1826, was a scholarly expansion and...
https://www.econlib.org/library/Malthus/malPop.html
homas Malthus believed that natural rates of human reproduction, when unchecked, would lead to geometric increases in population: population would grow in a ratio of 2, 4, 8, 16, 32, 64 and so on. However, he believed that food production increased only in arithmetic progression: 2, 4, 6, 8, 10.
http://www.victorianweb.org/economics/essay.html
By T. Robert Malthus 1798. Preface. The following Essay owes its origin to a conversation with a friend, on the subject of Mr Godwin's essay on. It is an obvious truth, which has been taken notice of by many writers, that population must always be kept down to the level of the means of subsistence...
https://www.constitution.org/cmt/malthus/population.htm
In 1798 Thomas Malthus wrote An Essay on the Principle of Population. It posed the conundrum of geometrical population growths outstripping arithmetic expansion in resources. Malthus, who was an Anglican clergyman, recommended late marriage and sexual abstinence as methods of birth control.
https://www.britannica.com/topic/An-Essay-on-the-Principle-of-Population-as-It-Affects-the-Future-Improvement-of-Society-with-Remarks-on-the-Speculations-of-Mr-Godwin-M-Condorcet-and-Other-Writers
Malthus Essay on Population also appeared some four decades before the emergence of modern soil science in the work of Justus von Liebig and others. Hence, along with his great contemporary David Ricardo, he saw the fertility of the soil as subject to only very limited improvement.
https://monthlyreview.org/1998/12/01/malthus-essay-on-population-at-age-200/
Thomas Malthus (1798). An Essay on the Principle of Population.. China and Indostan - Evil tendency of one of the clauses in Mr Pitt's Poor Bill - Only one proper way of encouraging population - Causes of the Happiness of nations - Famine, the last and most dreadful mode by which nature...
https://www.marxists.org/reference/subject/economics/malthus/ch07.htm