Reasons include:
- Cultural and ethnic pluralism.
- Economic disparities and regional imbalances.
- Desire to maintain separate identity due to historical factors.
- Self-interest of deposed Maharajas and dispossessed Zamindars.
- Failure of national parties to meet regional aspirations.
- Reorganisation of states on language basis.
- Charismatic personality of regional leaders.
- Factional fights within larger parties.
- Centralising tendencies of the Congress party.
- Absence of a strong opposition party at the central level.
- Role of caste and religion in politics.
- Alienation and discontentment among tribal groups.