Mesalliance

Hypergamy (colloquially referred to as "marrying up") is a term used in social science for the act or practice of a person marrying another of higher caste or social status than themselves.

The antonym "hypogamy" refers to the inverse: marrying a person of lower social class or status.

Both terms were coined in India in the 19th century while translating classical Hindu law books, which used the Sanskrit terms anuloma and pratiloma for the two concepts.

Forms of hypergamy have been practiced throughout history, including in India, imperial China, ancient Greece, the Ottoman Empire, feudal Europe, and the United States.

Today most people marry their approximate social equals, and in much of the world hypergamy is in slow decline: for example, it is becoming less common for women to marry older men. However, even in relatively gender-equal societies it is generally accepted that young women will often partner with powerful older men.

Studies of heterosexual mate selection in dozens of countries around the world have found men and women report prioritizing different traits when it comes to choosing a mate, with men tending to prefer women who are young and attractive and women tending to prefer men who are rich, well-educated, ambitious, and attractive.Evolutionary psychologists contend this is an inherent sex difference arising out of sexual selection, with men driven to seek women who will give birth to healthy babies and women driven to seek men who will be able to provide the necessary resources for the family's survival. Social learning theorists, however, say women value men with high earning capacity because women's own ability to earn is constrained by their disadvantaged status in a male-dominated society. They argue that as societies shift towards becoming more gender-equal, women's mate selection preferences will shift as well. Some research support that theory, including a 2012 analysis of a survey of 8,953 people in 37 countries, which found that the more gender-equal a country, the likelier male and female respondents were to report seeking the same qualities as each other rather than different ones. However, Townsend (1989) surveyed medical students regarding their perception of how the availability of marriage partners changed as their educational careers advanced. Eighty-five percent of the women indicated that "As my status increases, my pool of acceptable partners decreases" (p. 246). In contrast, 90% of men felt that "As my status increases, my pool of acceptable partners increases" (p. 246).

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