Final answer:
Goldthorpe's theory, introduced in 1968, revolves around social stratification and mobility, emphasizing the impact of employment relations and economic factors on class structures.
Step-by-step explanation:
The question refers to the theory proposed by John H. Goldthorpe in 1968, which is focused on social stratification and mobility. Goldthorpe's class schema, also known as the Goldthorpe classification, is a framework for understanding the hierarchies and class structures in society.
His research was primarily concerned with the relationship between employment relations and class structure. The theory suggested that the labor market and related economic factors significantly influence social stratification, affecting opportunities for social mobility. Over time, the Goldthorpe schema has been widely used in the analysis of social inequality and has been influential in the development of sociological studies on class and stratification.