This appointment may have been the first professional post in Economics held by anyone in human history.
Other works include An Inquiry into the Nature and Progress of Rent (1815) and Principles of Political Economy (1820).
His main contribution is to Economics where a theory, published anonymously as "An Essay on the Principle of Population" in 1798 has as a central argument that populations tend to increase faster than the supply of food available for their needs.
To quote directly from the essay:- "Population, when unchecked, increases in a geometrical ratio.
The result of this would be the formation of a new species.
Here, then, I had at last got a theory by which to work.I asked him if he thought it sufficiently important to show it to Sir Charles Lyell, who had thought so highly of my former paper. In a covering letter Wallace asked that Darwin forward the memoir to a famous scientist, Sir Charles Lyell, if Darwin thought the content merited his attention.Darwin had not intended to publish his own theorisings but this approach by Wallace forced his hand.One day something brought to my recollection Malthus's "Principles of Population", which I had read about twelve years before.I thought of his clear exposition of "the positive checks to increase" - disease, accidents, war, and famine - which keep down the population of savage races to so much lower an average than that of more civilized peoples.The unfolding scenario in which these events took place are more fully considered on our page about the development of Evolutionary Theory independently by Charles Darwin and Alfred Russel Wallace.From 1805 until his death Thomas Malthus was Professor of Modern History and Political Economy at the newly established college of the East India Company at Haileybury.He was subsequently ordained as an Anglican cleric in 1797 despite having an inconvenient speech impediment.He became curate of the parish of Albury in Surrey in 1798 and held this post for a short time.The outcome being that this burst of inspiration together with his more longstanding ruminations resulted in Alfred Russel Wallace independently framing a theory of the evolutionary origin of species by natural selection.At the time in question I was suffering from a sharp attack of intermittent fever, and every day during the cold and succeeding hot fits had to lie down for several hours, during which time I had nothing to do but to think over any subjects then particularly interesting me.