Which class of families was primarily characterized as nuclear due to the importance and cost of education?

The middle class is primarily characterized as nuclear due to the importance and cost of education because they often prioritize educational attainment as a means to maintain or enhance their social position and economic status. In middle-class families, the nuclear family structure—typically consisting of two parents and their children—is more common as it allows for better resource allocation, both in terms of time and financial investment, towards children's education.

Education is seen as a critical factor for social mobility and stability in middle-class families, who may invest significantly in their children's schooling, extracurricular activities, and higher education. This investment reflects their values and the societal expectation that education is essential for success and maintaining their middle-class status.

In contrast, other classes may have differing structures or emphasis on education. For instance, working-class families may value education but often face financial constraints that affect their ability to prioritize education in the same way. Lower class families might focus more on immediate economic survival than on long-term educational aspirations. Hence, the middle class stands out for its strong association with the nuclear family and the significant emphasis placed on education.