How is the harappan system different to the aryan system?

The Harappan system, associated with the Indus Valley Civilization, was characterized by urban planning, advanced drainage systems, and a focus on trade and agriculture, with little evidence of a centralized political structure or hierarchy. In contrast, the Aryan system, emerging later, was based on a tribal and pastoral lifestyle, with a social hierarchy that evolved into the Caste System and a more fragmented political organization centered around warrior chiefs. Additionally, the Aryans were predominantly nomadic, while the Harappans established permanent settlements. These fundamental differences highlight the distinct societal structures and lifestyles of these two ancient civilizations.