The caste system is a hereditary social class hierarchy in Hindu society. Levels flow by degrees of polluted to pure designations of social status. Dalits (street sweepers, outcasts, waste cleaners), Sudra (farmers, workers, servants), vaisyas (merchants and skilled workers), Kshatriyas (kings, rulers, warriors), and Brahmins (priests).
This system has political status because many castes have developed individual political parties providing politicians with almost constituents (supporters). The state of India feels that the caste system is vital in supporting mobilization and policy development.
Castes in Indian society refer to a social group where membership is decided by birth. Members of such local groups are endogamous, i.e. they tend to enter into marital relationships among themselves. They often have related political preferences.