Abstract: Social dominance orientation was a concept from social dominance theory, reflecting the extent to which one desires that one’s in-group dominate and be superior to outgroups. Persons who had high level of social dominance orientation prefered enhancing hierarchy, and desired that “inferior” groups should be more dominated by “superior” groups, while persons who had low level of social dominance orientation prefered attenuating hierarchy, and desired that ‘inferior’ groups wouldn’t be dominated by “superior” groups. As a result, Social dominance orientation could influence social equality, and explain the prejudice. The level of social dominance orientation was influenced by gender and group status. Social dominance orientation correlated to interpersonal dominance

Key words: social dominance orientation, equality, prejudice, power