Thomas Robert Malthus, naturalist of the mind.

In 1798, Thomas Robert Malthus's infamous was published. The publication of the is best remembered for Malthus's principle - that population multiplies geometrically as opposed to subsistence increasing arithmetically. What is not well known, however, is that Malthus's also offered a sophisticated - and heterodox - theory of mind. Despite a recent revival in Malthusian scholarship, Malthus's theory of mind has been largely forgotten. The present study attempts to address this neglected area within the literature, by evaluating Malthus's contribution to the naturalization of the soul. I first situate Malthus's theory of mind within the 's broader naturalization project, examining Malthus's role as naturalist; his views on humans as animals; and the 's cosmology. This is followed by an exploration of the making and reception of the , illustrating how readers widely interpreted Malthus's theory of mind as a theory of naturalization. Finally, I reconstruct Malthus's naturalized system of mind, discussing the mechanisms and dynamics involved in the operation of a materialist mind. In sum, I argue for the centrality of Malthus's in the larger naturalization movement, specifically as it pertains to the soul.