Julie Greenberg writes that although gender and sex are separate concepts, they are interlinked in that gender discrimination often results from stereotypes based on what is expected of members of each sex.
There are qualitative analyses that explore and present the representations of gender; however, feminists challenge these dominant ideologies concerning gender roles and biological sex.
One's biological sex is directly tied to specific social roles and the expectations.
Judith Butler considers the concept of being a woman to have more challenges, owing not only to society's viewing women as a social category but also as a felt sense of self, a culturally conditioned or constructed subjective identity.
According to Aristotle, this concept was introduced by the Greek philosopher Protagoras. To talk of persons..the masculine or feminine g[ender], meaning of the male or female sex, is either a jocularity (permissible or not according to context) or a blunder." and was popularized and developed by the feminist movement from the 1970s onwards (see § Feminism theory and gender studies below).
The theory was that human nature is essentially epicene and social distinctions based on sex are arbitrarily constructed.