They introduced a caste system, which persists to the present day.
The Vedic people, who were nomads from the Eurasian steppes, migrated to the Indus valley beginning about 1500 bc. They introduced a caste system, which persists to the present day. The caste system divides all people into social classes with differing rights and obligations. It was a formal expression of the interdependent labor division seen in all civilizations. By the 6th century bc at least 16 states had been established on the Indian subcontinent.