Regionalism refers to the ideology of commitment to particular regional identity which could be based on language, ethnicity and other characteristics in addition to geography.

The term 'untouchability' is a social practice within the caste system in which members of the lowest caste are considered to be ritually impure to such an extent that they can cause pollution by mere touch. Untouchable castes are at the bottoms of the hierarchical system.

1. Community identity is commonly based on birth and belonging rather than on some form of acquired qualifications.
2. The ascriptive identities and community feeling is that they are universal.

Tribes have been classified in India according to their 'permanent' and 'acquired' traits.
Permanent Traits: Permanent traits have region, language, ecological habitat and physical characteristics
Acquired Traits: There are mainly two criteria are used in the category of acquired traits:(a) Mode of livelihood (b) Extent of incorporation into Hindu Society.

According to the Adam Smith, The 'invisible hand' is an unseen force at work that converts what is good for each individual into what is good for society.