The Aryans played a fundamental role in ancient Indian history, particularly with the formation of the Vedic civilization around 1500 BCE. They are believed to have migrated into the Indian subcontinent, bringing with them their social structure, religious practices, and the Sanskrit language. The Vedas, the oldest sacred texts of Hinduism, were composed during this period, shaping the spiritual and cultural foundations of future Indian civilization. The Aryan influence also led to the development of the caste system, which would impact Indian society for centuries to come, illustrating the complexities of cultural integration and identity.