Minority group is a term referring to a category of people differentiated from the social majority, i.e. those who hold the majority of positions of social power in a society, and may be defined by law. Rather than a relational "social group", as the term would indicate, minority group refers to the above-described. The differentiation can be based on one or more observable human characteristics, including, but not limited to: ethnicity, race, religion, caste, gender, wealth, health or sexual orientation. Usage of the term is applied to various situations and civilizations within history, despite its popular mis-association with a numerical, statistical minority. In the social sciences, the term "minority" is used to refer to categories of persons who hold fewer positions of social power.