In human geography, McNeill's law is the process outlined in William H. McNeill's book Plagues and Peoples. The process described concerns the role of microbial disease in the conquering of people-groups. Particularly, it describes how diseases such as smallpox, measles, typhus, scarlet fever, and sexually-transmitted diseases have significantly reduced native populations so that they are unable to resist colonization.
According to McNeill's Law, the microbiological aspect of conquest and invasion has been the deciding principle or one of the deciding principles in both the expansion of certain empires (as during the emigration to the Americas) and the containment in others (as during the crusades). The argument is that less civilized peoples were easily subjugated due to the immunological advantages of those coming from civilized countries. An evidence presented to support the hypothesis involves the manner diseases associated with Europeans were rebuffed in their forays into disease-experienced countries such as China and Japan.
McNeill's law also maintains that parasites are not only natural but also social in the sense that these organisms are part of the social continuum and that the human social evolution is inextricably linked with genetic transformations.
Instances in historyEdit
The first people-group fully wiped out due to European expansion (with the possible exception of the Arawaks) was the Guanches of the Canary Islands. Despite an inbred ferocity, superior knowledge of the land and even a possible tactical superiority, they were eventually wiped out through the concentrated efforts of the Spanish and Portuguese. McNeill's Law would place the deciding factor squarely on the introduction of deadly diseases and parasites from the mainland to the previously geographically isolated islanders.
This is the likely explanation, as what records still exist show numerous deaths by disease on the islands and a declining birth-rate, leading eventually to the almost complete end of the Guanches as a race.
- McNeill, William. Plagues and People. p. 340. ISBN 978-1439503133.
- Fowler, Charles W. (2009). Systemic Management: Sustainable Human Interactions with Ecosystems and the Biosphere. Oxford: Oxford University Press. p. 108. ISBN 9780199540969.
- Goodier, Robert (July–August 2010). "A germ of an idea". University of Chicago Magazine. University of Chicago Alumni Association. ISSN 0041-9508. Retrieved May 3, 2016.
- Backhaus, Gary; Murungi, John (2006). Ecoscapes: Geographical Patternings of Relations. Lanham, MD: Lexington Books. p. 4. ISBN 9780739114490.
- Koslowski, Rey (2000). Migrants and Citizens: Demographic Change in the European State System. Ithaca, NY: Cornell University Press. p. 50. ISBN 0801437148.
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