Without it, capitalism could not function, because it provides an army of free domestic workers to care for children and other dependants in the home, and it weakens and divides the working class. Youth, children, lesbians and gay men are also socially oppressed. Children and youth are denied independence in order to preserve this family model. They can suffer anything from casual mistreatment through to sexual abuse and death in its name. Sexuality which challenges this structure, such as homosexuality, is condemned.
Oppression follows condemnation.
Other major forms of social oppression relate not to the family but to the nation state. The oppression of one set of nations, nationalities and peoples by others is a fundamental feature of the imperialist epoch. Exploitation Imperialist countries like Britain or the USA exploit semi-colonies in Africa, Latin America and Asia. But they also oppress their people, through racial oppression and, for example, the denial of basic human rights of people from semi-colonies who seek work in imperialist countries. These are direct products of social oppression, direct products of the capitalist free market which requires such oppression.