Assortative Mating, Class, and Caste
We develop a quantitative genetic model of positive assortative mating for a neutral trait, where trait is simply a direction in a high dimensional space. We think of conscientiousness or intelligence or aggressiveness or earnings potential as examples of traits that might be important to social science (without suggesting that these are or ever were neutral). Even though the trait is selectively neutral, the mating system mimics strong selection both for and against the trait, depending on the group membership of an individual. The mating system generates strong group differences very rapidly and, as the system persists, arbitrary groups are transformed into something like hereditary castes.
KeywordsCaste Socioeconomic status Class Kinship Relationship Correlation between mates Inbreeding
- Björklund, A., & Jäntti, M. (1997). Intergenerational income mobility in Sweden compared to the United States. The American Economic Review, 87(5), 1009–1018.Google Scholar
- Harpending, H., & Cochran, G. (2013). Raking a table. http://westhunt.wordpress.com/2013/08/04/raking-a-table/. Acessed 15 Sep 2013.
- Herrnstein, R. J. (1973). I.Q. in the meritocracy (1st ed.). New York: Little, Brown.Google Scholar
- Herrnstein, R. J., & Murray, C. (1996). The bell curve: Intelligence and class structure in American life (A Free Press Paperbacks book) (1st Free Press pbk.). New York: Free Press.Google Scholar
- Hostetler, J. A. (1980). Amish society (3rd ed.). Baltimore: Johns Hopkins University Press.Google Scholar
- Khan, R. (2013). Genetics is one: Mendelism and quantitative traits—The Unz review. http://www.unz.com/gnxp/genetics-is-one-mendelism-and-quantitative-traits/. Acessed 15 Sep 2013.
- Kraybill, D. B. (2001). The riddle of Amish culture. Baltimore: Johns Hopkins University Press.(Rev. ed.).Google Scholar
- Mathematica. (2012). Mathematica. Version 9, Wolfram Research.Google Scholar
- Milot, E., Mayer, F. M., Nussey, D. H., Boisvert, M., Pelletier, F., & Réale, D. (2011). Evidence for evolution in response to natural selection in a contemporary human population. Proceedings of the National Academy of Sciences, 108(41), 17040–17045.Google Scholar
- Murray, C. (2013). Coming apart: The state of white America, 1960–2010 (Reprint ed.). Crown Forum.Google Scholar
- Schwartz, C. R., & Mare, R. D. (2005). Trends in educational assortative marriage from 1940 to 2003. Journal of the American Statistical Association, 42(4), 621–646.Google Scholar
- Zimmerman, D. J. (1992). Regression toward mediocrity in economic stature. The American Economic Review, 82, 409–429.Google Scholar