Social dominance theory (SDT) argues that all human societies form group-based hierarchies. A social hierarchy is where some individuals receive greater prestige, power or wealth than others. A group-based hierarchy is distinct from an individual-based hierarchy in that the former is based on a socially constructed group such as race, ethnicity, religion, social class and freedoms, linguistic group, etc. while the latter is based on inherited, athletic or leadership ability, high intelligence, artistic abilities, etc. A primary assumption in social dominance theory (SDT) is that
racism,
sexism,
nationalism, and
classism are all manifestations of the same human disposition to form group-based social hierarchies. The social tiers described by multiple intersectional
theories of stratification become organized into hierarchies due to forces that SDT believes are best explained in
evolutionary psychology to offer high survival value. Human social hierarchies are seen to 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 and occupy higher status positions illustrating the iron law of
androcracy. As a role gets more powerful,
Putnam’s law of increasing disproportion becomes applicable and the probability the role is occupied by a hegemonic group member increases. SDT adds new theoretical elements attempting a comprehensive synthesis of explanations of the three mechanisms of group hierarchy oppression that are regulated by legitimizing myths: • Aggregated individual discrimination (ordinary discrimination) • Aggregated institutional discrimination (by governmental and business institutions) •
State terrorism (e.g.,
police violence,
death squads) • Behavioural asymmetry • Deference–systematic outgroup favouritism (minorities favour members of dominant group) • asymmetric ingroup bias (as status increases, in-group favoritism decreases) • self-handicapping (
self-categorization as an inferior becomes a
self-fulfilling prophecy) • ideological asymmetry (as status increases, so do beliefs legitimizing and/or enhancing the current social hierarchy) Although the nature of these hierarchical differences and inequality differs across cultures and societies, significant commonalities have been verified empirically using the social dominance orientation (SDO) scale. In multiple studies across countries, the SDO scale has been shown to correlate robustly with a variety of group prejudices (including
sexism,
sexual orientation prejudice, racism, nationalism) and with hierarchy-enhancing policies. Social dominance theory also emphasizes that group-based hierarchies are closely tied to the distribution of resources, opportunities, and social status within a society. These hierarchies tend to privilege dominant groups while systematically disadvantaging subordinate groups, often in ways that are not explicitly recognized or acknowledged. As a result, individuals may experience unequal access to education, healthcare, and economic opportunities depending on their position within the social structure. The theory further suggests that these hierarchical divisions are influenced by a variety of social categories, including race, gender, religion, age, and economic status. These categories shape how individuals are grouped within society and determine their relative access to power and privilege. Importantly, such hierarchies are not always consciously constructed, but may instead emerge through long-standing social practices and cultural norms. Another key aspect highlighted in the literature is that social dominance hierarchies are nearly universal across human societies, although their specific forms and determining factors may vary depending on cultural and historical context. This universality suggests that hierarchical organization is a recurring feature of social systems, even though the criteria for dominance differ across societies. Additionally, the theory draws attention to the role of social structures in maintaining inequality over time. Once established, hierarchies can shape individuals’ life trajectories by influencing their perceived social status, access to resources, and opportunities for upward mobility. This process contributes to the persistence of inequality and reinforces existing social divisions across generations.
Behavioural asymmetry According to the theory, group-based inequalities are also shaped by interactions between groups. Behavioural asymmetry refers to the tendency of members of dominant and subordinate groups to exhibit different patterns of behaviour, which can facilitate greater access to resources for dominant groups. Several forms of behavioural asymmetry have been identified. Asymmetric ingroup bias reflects the tendency of dominant group members to favour their own group more strongly than subordinate group members. In some cases, members of subordinate groups may even display outgroup favouritism toward dominant groups. Finally, members of dominant groups are more likely to adopt ideologies, beliefs, attitudes, and behaviours that support the maintenance of hierarchical systems. All else being equal, they are also more likely to score higher on social dominance orientation, which facilitates the continuation of social hierarchies in their favour. This process is referred to as ideological asymmetry. ==Legitimizing myths theory==