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Social dominance theory
Social dominance theory (SDT) is a theory of intergroup relations that focuses on the maintenance and stability of group-based social hierarchies. According to the theory, group-based inequalities are maintained through three primary intergroup behaviors—specifically: institutional discrimination, aggregated individual discrimination, and behavioral asymmetry. SDT proposes that widely shared cultural ideologies (i.e., legitimizing myths) provide the moral and intellectual justification for these intergroup behaviors. There are two functional types of legitimizing myths: (1) hierarchy-enhancing and (2) hierarchy-attenuating legitimizing myths. Hierarchy-enhancing ideologies (e.g., racism or meritocracy) contribute to greater levels of group-based inequality. Hierarchy-attenuating ideologies (e.g., anarchism and feminism) contribute to greater levels of group-based equality. People endorse these different forms of ideologies based in part on their psychological orientation toward dominance and their desire for unequal group relations (i.e., their social dominance orientation; SDO). People who are higher on SDO tend to endorse hierarchy-enhancing ideologies, and people who are lower on SDO tend to endorse hierarchy-attenuating ideologies. SDT finally proposes that the relative counterbalancing of hierarchy-enhancing and -attenuating social forces stabilizes group-based inequality.
==Origin==
Social Dominance Theory was first formulated〔 by psychology professors Jim Sidanius and Felicia Pratto. The theory begins with the observation that human social groups tend to be organized according to group-based social hierarchies in societies that produce economic surplus. These hierarchies have a trimorphic (3-form) structure. This means that these hierarchies are based on (1) age (i.e., adults have more power and higher status than children), (2) gender (i.e., men have more power and higher status than women), and (3) arbitrary-set, which are group-based hierarchies that are culturally defined and do not necessarily exist in all societies. Arbitrary-set hierarchies can be based on ethnicity (e.g., Whites over Blacks in the U.S.), religion, nationality, and so on. Human social hierarchies consist of a hegemonic group at the top and negative reference groups at the bottom. More powerful social roles are increasingly likely to be occupied by a hegemonic group member (for example, an older white male). Males are more dominant than females, and they possess more political power (the iron law of andrarchy). Most high-status positions are held by males.〔 Prejudiced beliefs, such as racism, sexism, nationalism and classism, are all manifestations of this same system of social hierarchy.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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