Aryan theory is a myth. There were no invasion. There is no evidence of such invasion. But Migration to India never stopped. People came to India in every century from only one direction, north west. read more
Your question called for looking at pre-Aryan India from the following multiple perspectives: Habitation A mountain of evidence unearthed by archaeologists over the years shows us that India was certainly not uninhabited before the coming of the Indo-Aryan speaking people (the "Aryans") in around 1,500 BC. read more
We know very little about the Dravidian people in India, who used to reside in the country before the Aryans invaded Northern India from Iran and Southern Russia. read more