>>212915591
>>212915862
Dravidians had their own civilizations e.g. the Chola Empire. When you see Indian influences in South East Asia e.g. names, languages, architecture e.g. Ankgor Wat https://en.wikipedia.org/wiki/Khmer_architecture and general culture, it's because of the dark skinned Dravidians and not the lighter skinned north Indians.

>>212915726
Iron working, sugar, ear and nose surgery, cotton cultivation and much more:
https://en.wikipedia.org/wiki/List_of_Indian_inventions_and_discoveries