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Meteorological climate theory

Another example of Montesquieu's anthropological thinking, outlined in The Spirit of Law and hinted at in Persian Letters, is his meteorological climate theory, which holds that climate may substantially influence the nature of man and his society, a theory also promoted by the French naturalist Georges-Louis Leclerc, Comte de Buffon. By placing an emphasis on environmental influences as a material condition of life, Montesquieu prefigured modern anthropology's concern with the impact of material conditions, such as available energy sources, organized production systems, and technologies, on the growth of complex socio-cultural systems.

He goes so far as to assert that certain climates are more favorable than others, the temperate climate of France being ideal. His view is that people living in very warm countries are "too hot-tempered", while those in northern countries are "icy" or "stiff". The climate of middle Europe is therefore optimal. On this point, Montesquieu may well have been influenced by a similar pronouncement in The Histories of Herodotus, where he makes a distinction between the "ideal" temperate climate of Greece as opposed to the overly cold climate of Scythia and the overly warm climate of Egypt. This was a common belief at the time, and can also be found within the medical writings of Herodotus' times, including the "On Airs, Waters, Places" of the Hippocratic corpus. One can find a similar statement in Germania by Tacitus, one of Montesquieu's favorite authors.

Philip M. Parker, in his book Physioeconomics (MIT Press, 2000), endorses Montesquieu's theory and argues that much of the economic variation between countries is explained by the physiological effect of different climates.

From a sociological perspective, Louis Althusser, in his analysis of Montesquieu's revolution in method, alluded to the seminal character of anthropology's inclusion of material factors, such as climate, in the explanation of social dynamics and political forms. Examples of certain climatic and geographical factors giving rise to increasingly complex social systems include those that were conducive to the rise of agriculture and the domestication of wild plants and animals.