This category includes in it those communities who did not...

This category includes in it those communities who did not accept the caste system and preferred to reside deep in the jungles, forests and mountains of India, away from the main population. The Scheduled Tribes are also called Adivasi, meaning aboriginals. The third category is called sometimes Other Backward Classes or Backward Classes. This category includes in it castes who belong to Sudra Varna and also former untouchables who converted from Hinduism to other religions.

This category also includes in it nomads and tribes who made a living from criminal acts. According to the central government policy these three categories are entitled for positive discrimination. Sometimes these three categories are defined together as Backward Classes. 15% of India's population are Scheduled Castes. According to central government policy 15% of the government jobs and 15% of the students admitted to universities must be from Scheduled Castes.

For the Scheduled Tribes about 7.5% places are reserved which is their proportion in Indian population. The Other Backwards Classes are about 50% of India's population, but only 27% of government jobs are reserved for them. Along with the central government, the state governments of India also follow a positive discrimination policy. Different states have different figures of communities entitled for positive discrimination based on the population of each state.

Different state governments have different lists of communities entitled for positive discrimination. Sometimes a specific community is entitled for rights in a particular state but not in another state of India. In modern India new tensions were created because of these positive discrimination policies. The high caste communities feel discriminated by the government policy to reserve positions for the Backward Classes.

In many cases a large number of high caste members compete for a few places reserved for them. While the Backward Classes members do not have to compete at all because of the large number of reserved places for them compared to the candidates. Sometimes in order to fill the quota, candidates from the lower classes are accepted even though they are not suitable.

Sometimes some reserved positions remain unmanned because there were few candidates from the lower classes causing more tension between the castes. Between the lower castes there are also tensions over reservation.