Periyar E.v. Ramasamy said this quote

We do not need to explain how the Aryans entered and settled in the Dravidian country (tira¯vit»a na¯» t»u), and subjugated and oppressed the Dravidians. Nor do we need to explain how before the Aryans entered the Dravidian country, the Dravidian country had a civilization and arts of the highest rank.