The ARyanic origin of caste is not really a racial divide -- Hinduism takes some aspects of Aryanic religions (like the gods Indra, Varuna etc.) but these are subsided in more ancient religious figures like Shiva (who is most likely Dravidian/Harappan in origin)
There are some racial orgins in this divide one would think, although it is not as obvious because of the population diversity.
There are some racial orgins in this divide one would think, although it is not as obvious because of the population diversity.