When the Aryans migrated to the Indus valley which of tge following group was most powerful?

When the Aryans migrated to the Indus Valley around 1500 BCE, the most powerful group at that time was the indigenous Dravidian population. The Dravidians had established advanced urban centers, such as those in the Indus Valley Civilization, which were known for their sophisticated architecture and trade networks. The arrival of the Aryans led to significant cultural and social changes, including the development of the Caste System and the integration of Vedic traditions.