Introduction:
Gender division is a complex concept that has been shaped by various factors throughout history. While many people believe that gender is solely determined by biology, there is a growing understanding that it is heavily influenced by social expectations and stereotypes. This essay will provide a detailed explanation of why gender division is not based on biology but on social expectations and stereotypes.

Social Construction of Gender:
- Gender is a social construct: Gender is not a natural or innate characteristic, but rather a social construct that is created and maintained by society. It is a set of expectations, norms, and roles that are assigned to individuals based on their perceived sex.
- Historical and cultural variations: Gender roles and expectations have varied across different societies and time periods, highlighting the social nature of gender. For example, in some cultures, men have traditionally taken on caregiving roles, while in others, women have been warriors and leaders.
- Fluidity of gender identities: The existence of diverse gender identities, such as transgender and non-binary individuals, challenges the notion that gender is solely determined by biology. These individuals often experience a disconnect between their assigned sex at birth and their gender identity, further emphasizing the social aspect of gender.

Socialization and Gender Stereotypes:
- Socialization process: From a young age, individuals are socialized into specific gender roles and expectations through various socializing agents, including family, media, education, and peer groups. These agents reinforce and perpetuate gender stereotypes, shaping individuals' understanding of how they should behave based on their assigned sex.
- Gender stereotypes: Society often assigns certain characteristics, behaviors, and roles to each gender based on stereotypes. For example, men are expected to be strong, assertive, and career-oriented, while women are expected to be nurturing, emotional, and focused on domestic responsibilities. These stereotypes limit individuals' choices and opportunities, reinforcing the idea that gender is socially constructed.
- Impact on individual experiences: Gender expectations and stereotypes have real-life consequences for individuals. Women may face discrimination and limited opportunities in the workplace, while men may feel pressured to conform to traditional masculine norms, suppressing their emotions and limiting their self-expression.

Conclusion:
In conclusion, gender division is not based on biology but on social expectations and stereotypes. Gender is a complex social construct that is shaped by historical, cultural, and social factors. Understanding the social nature of gender is crucial for challenging and dismantling harmful stereotypes and promoting gender equality.