Gender has several controversial definitions but it here refers to an individual's inner sex or psychological sense of being a male or female irrespective of one's (outer) sex identity as determined by one's sexual organs. There are two main genders: masculine (male), or feminine (female). Gender identity refers to the options available to members of a society to choose from a set of social identities, based on the combination of one's sex identity on the one hand, and one's natural gender, interests and social experiences on the other. Some ancient tribes have more than five human genders. Some non-Western societies have three human genders – man, woman and third gender. Gender roles refers to the set of attitudes and behaviors socially expected from the members of a particular gender identity. Gender roles are socially constructed which are often politicised and manipulated, which then result in the oppression of people.

In the modern West, this essential requirement has been changed to a heterosexual desire, resulting in the Western concepts of 'homosexual' and 'heterosexual,' instead of the usual gender identities for males. Researchers recognize that the concrete behavior of individuals is a consequence of both socially enforced rules and values, and individual disposition, whether genetic, unconscious, or conscious. Some researchers emphasize the objective social system and others emphasize subjective orientations and dispositions.[citation needed] Creativity may cause the rules and values to change over time. Cultures and societies are dynamic and ever-changing, but there has been extensive debate as to how, and how fast, they may change. Such debates are especially contentious when they involve the gender/sex system, as people have widely differing views about how much gender depends on biological sex.

Working in the United States, Talcott Parsons developed a model of the nuclear family in 1955. (At that place and time, the nuclear family was the prevalent family structure.) It compared a strictly traditional view of gender roles (from an industrial-age American perspective) to a more liberal view.

The Parsons model was used to contrast and illustrate extreme positions on gender roles. Model A describes total separation of male and female roles, while Model B describes the complete dissolution between gender roles. (The examples are based on the context of the culture and infrastructure of the United States.)

However, these extreme positions are rarely found in reality; actual behavior of individuals is usually somewhere between these poles. The most common 'model' followed in real life in the United States and Britain is the 'model of double burden' (See Gender roles and feminism below).[citation needed]

According to the interactionist approach, roles (including gender roles) are not fixed, but are constantly negotiated between individuals. In North America and southern South America, this is the most common approach among families whose business is agriculture.

Gender roles can influence all kinds of behaviors, such as choice of clothing, choice of work and personal relationships; E.g., parental status (See also Sociology of fatherhood).

The process through which the individual learns and accepts roles is called socialization. Socialization works by encouraging wanted and discouraging unwanted behavior. These sanctions by agents of socialization such as the family, schools, and the media make it clear to the child what is expected of the child by society. Mostly, accepted behavior is not produced by outright reforming coercion from an accepted social system. In some other cases, various forms of coercion have been used to acquire a desired response or function.

It is claimed that even in monolingual, industrial societies like urban North America, some individuals do cling to a "modernized" primordial identity, apart from others and with this a more diverse gender role is recognized or developed. Some intellectuals, such as Michael Ignatieff, argue that convergence of a general culture does not directly entail a similar convergence in ethnic, social and self identities. This can become evident in social situations, where people divide into separate groups by gender roles and cultural alignments, despite being of an identical "super-ethnicity", such as nationality.

Within each smaller ethnicity, individuals may tend to see it perfectly justified to assimilate with other cultures including sexuality and some others view assimilation as wrong and incorrect for their culture or institution. This common theme, representing dualist opinions of ethnoconvergence itself, within a single ethnic or common values groups is often manifested in issues of sexual partners and matrimony, employment preferences, etc. These varied opinions of ethnoconvergence represent themselves in a spectrum; assimilation, homogenization, acculturation, gender identities and cultural compromise are commonly used terms for ethnoconvergence which flavor the issues to a bias.