Answer
The caste system developed partly because the Aryan invaders considered themselves superior to the darker - skinned people of the Indus.
Step-by-step explanation:
Caste system is the system which came in the society a lot of years ago and prevails even today, divided the people of the society in to different castes and there was discrimination among the people who belonged to the lower classes.
This system came into the Indian society because of the Aryans and thought of themselves to be from the upper caste and tried to control the rest of the population.