Obviously tantricism arose as a result of the large-scale admission of the aboriginal peoples in brahmanical society. - Ram Sharan Sharma

It is also true that the present Ayodhya is the same old Ayodhya...It is also true that it is found from the sources of Jain religion that Saket and Ayodhya are the same, It is also true that at many places, Lord Rama has been referred to as Koshal Naresh (king of Koshal)

The most explicit statement of immigration into the Subcontinent.

From the seventh century A.D. onwards the Bhakti cult spread throughout the country, and especially in the south. Bhakti meant that people made all kinds of offerings to the god in return for which they received the prasada or the favour of the god. It meant that the devotees completely surrendered to their God. This practice can be compared to the complete dependence of the tenants on the land-owners.