Key principles of social stratifications are:
A. Social stratification is a characteristic of society, not simply a function of individual differences.
B. Social stratification persists over generations.
C. Social stratification is supported by patterns of belief, or ideology

All of the above

Three key principles help explain social stratification:

1. Social stratification is a characteristic of society, not simply a function of individual differences. Social stratification is a society-wide system that unequally distributes social resources among categories of people. In the most technologically primitive societies – hunting and gathering societies, for instance – little was produced so only rudimentary social stratification could exist. In more technologically advanced societies where people produce a surplus over and above their basic needs, however, social resources are unequally distributed to various social categories regardless of people’s innate individual abilities.

2. Social stratification persists over generations. It is closely linked to the family and to the inheritance of social resources from one generation to the next. A person’s social position is ascribed. That is, children assume the social positions of their parents. Within the caste system, birth dictates occupational opportunities. A Dalit is likely to be confined to traditional occupations such as agricultural labour, scavenging, or leather work, with little chance of being able to get high-paying white-collar or professional work. The ascribed aspect of social inequality is reinforced by the practice of endogamy. That is, marriage is usually restricted to members of the same caste, ruling out the potential for blurring caste lines through intermarriage.

3. Social stratification is supported by patterns of belief, or ideology. No system of social stratification is likely to persist over generations unless it is widely viewed as being either fair or inevitable. The caste system, for example, is justified in terms of the opposition of purity and pollution, with the Brahmins designated as the most superior and Dalits as the most inferior by virtue of their birth and occupation. Not everyone, though, thinks of a system of inequality as legitimate. Typically, people with the greatest social privileges express the strongest support for systems of stratification such as caste and race. Those who have experienced the exploitation and humiliation of being at the bottom of the hierarchy are most likely to challenge it.