The term has also been used to refer to other groups, including the Burakumin of Japan, the Baekjeong of Korea, and the Ragyabpa of Tibet, as well as the Romani people and Cagot in Europe, and the Al-Akhdam in Yemen.
[4][5] Traditionally, the groups characterized as untouchable were those whose occupations and habits of life involved ritually "polluting" activities, such as pursuing a career based on killing (e.g. fishermen) or engaging in common contact with others' feces or sweat (e.g. manual scavengers, sweepers and washermen).
[10] Austrian ethnologist Christoph von Fürer-Haimendorf theorized that untouchability originated as class stratification in urban areas of the Indus Valley civilisation.
According to this theory, the poorer workers involved in 'unclean' occupations such as sweeping or leather work were historically segregated and banished outside the city limits.
According to him, in this society, certain occupational groups were thought to be involved in controlling the malevolent supernatural forces; as an example, Hart mentions the Paraiyars, who played the drums during battles and solemn events such as births and deaths.
For example, some Shrauta Sutras mandate that a performer of the Vishvajit sacrifice must live with the Nishadas (a tribe regarded as untouchable in later period) for three days, in their village, and eat their food.
[18] According to Jaiswal, when the members of aboriginal groups were assimilated into the Brahmanical society, the privileged among them may have tried to assert their higher status by disassociating themselves from their lower-status counterparts, who were gradually branded as untouchables.
[7] According to Sarah Pinto, an anthropologist, modern untouchability in India applies to people whose work relates to "meat, and bodily fluids".
According to the textbook Religions in the Modern World, B. R. Ambedkar, who was also a supporter of the Act, was considered to be the "untouchable leader" who made great efforts to eliminate caste system privileges that included participation in public festivals, access to temples, and wedding rituals.
[24]Gandhi achieved some success through his hunger strike however Dalit activists faced pressure from the Hindu population at large to end his protest at the risk of his ailing health.
The 1950 national constitution of India legally abolished the practice of untouchability and provided measures for affirmative action in both educational institutions and public services for Dalits and other social groups who lie within the caste system.