Sociologists categorize systems of social stratification based on their level of social mobility, which refers to the ability to change one's position within the social hierarchy. In a closed system, social mobility is extremely limited or nonexistent, meaning individuals are largely confined to the social class into which they were born. A classic example of a closed system is the caste system, historically seen in India, where social status is inherited and fixed at birth. Such systems often promote endogamous marriages, where individuals marry within their own social class, reinforcing and perpetuating social inequalities over generations.
In contrast, open systems allow for varying degrees of social mobility. One common form of an open system is the class system, prevalent in countries like the United States and the United Kingdom. Here, social position is influenced both by inherited status and individual ability, such as educational attainment or occupational success. This system enables people to move upward or downward in the social hierarchy based on merit and effort.
A more idealized form of open stratification is the meritocracy, where social status is determined solely by individual ability and achievement. Although no pure meritocracies exist at the societal level, this concept serves as a theoretical model emphasizing equal opportunity based on merit.
Open systems also increase the likelihood of exogamous marriages, where individuals marry across different social classes, potentially fostering greater social integration and mobility. However, such marriages are not guaranteed and depend on various social factors.
Globally, there is a noticeable trend toward more open systems of stratification, reflecting increased opportunities for social mobility and a gradual shift away from rigid, birth-based hierarchies. Understanding these systems highlights the complex interplay between social structure, individual agency, and the persistence or reduction of social inequalities.