The caste system in India is the paradigmatic ethnographic instance of social classification based on castes. It has its origins in ancient India, and was transformed by various ruling elites in medieval, early-modern, and modern India, especially in the aftermath of the collapse of the Mughal Empire and the establishment of the British Raj.[1][2][3][4]
Beginning in ancient India, the caste system was originally centered around varna, with Brahmins (priests) and, to a lesser extent, Kshatriyas (rulers and warriors) serving as the elite classes, followed by Vaishyas (traders, merchants, and farmers) and finally Shudras (labourers). Outside of this system are the oppressed, marginalised, and persecuted Dalits (also known as "Untouchables") and Adivasis (tribals).[5][6] Over time, the system became increasingly rigid, and the emergence of jati led to further entrenchment, introducing thousands of new castes and sub-castes.[7] With the arrival of Islamic rule, caste distinctions formulated in Muslim communities, across the subcontinent, as well.[1][8][9] The British Raj furthered the system, through census classifications and preferential treatment to Christians and people belonging to certain castes.[8] Social unrest during the 1920s led to a change in this policy towards affirmative action.[10][11][12] Today, there are around 3,000 castes and 25,000 sub-castes in India.[13]
Caste-based differences have also been practised in other regions and religions in the Indian subcontinent, like Nepalese Buddhism,[14] Christianity, Islam, Judaism and Sikhism.[15] It has been challenged by many reformist Hindu movements,[16] Buddhism, Sikhism, Christianity,[15] and present-day Neo Buddhism.[17] With Indian influences, the caste system is also practiced in Bali.[18]
After achieving independence in 1947, India banned discrimination on the basis of caste and enacted many affirmative action policies for the upliftment of historically marginalised groups as enforced through its constitution.[19] However, the system continues to be practiced in India, and caste-based discrimination, segregation, violence, and inequality persist.[20]
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Independent India's constitution banned discrimination on the basis of caste, and, in an attempt to correct historical injustices and provide a level playing field to the traditionally disadvantaged, the authorities announced quotas in government jobs and educational institutions for scheduled castes and tribes, the lowest in the caste hierarchy, in 1950.