In ancient India there developed a social system in which people were divided into separate close communities. These communities are known in English as caste. The origin of the caste system is in Hinduism, but it affected the whole Indian society. The caste system in the religious form is basically a simple division of society in which there are four castes arranged in a hierarchy and below them the outcast. But socially the caste system was more complicated, with much more castes and sub-castes and other divisions. Legally the government disallows the practice of caste system but has a policy of affirmative discrimination of the backward classes.
The leaders of independent India decided that India will be democratic, socialist and secular country. According to this policy there is a separation between religion and state. Practicing untouchability or discriminating a person based on his caste is legally forbidden. Along with this law the government allows positive discrimination of the depressed classes of India.
In modern India the term caste is used for Jat and also for Varna. The term, caste was used by the British who ruled India until 1947. The British who wanted to rule India efficiently made lists of Indian communities. They used two terms to describe Indian communities. Castes and Tribes. The term caste was used for Jats and also for Varnas. Tribes were those communities who lived deep in jungles, forests and mountains far away from the main population and also communities who were hard to be defined as castes for example communities who made a living from stealing or robbery. These lists, which the British made, were used later on by the Indian governments to create lists of communities who were entitled for positive discrimination.
The higher classes, which were the elite of the Indian society, were classified as high castes. The other communities were classified as lower castes or lower classes. The lower classes were listed in three categories. The first category is called Scheduled Castes. This category includes in it communities who were untouchables. In modern India, untouchability exists at a very low extent. The untouchables call themselves Dalit, meaning depressed. Until the late 1980s they were called Harijan, meaning children of God. This title was given to them by Mahatma Gandhi who wanted the society to accept untouchables within them.
The second category is Scheduled Tribes. 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.