yes, i agree with what you say. if we mention every great civilization in India then we would have to mention every single subgroup. Its may also hard to trust a fellow indian who says one civilization was greater than the next just because they might have ulterior motive to make their own people sound better.
What we can go with is (unbiased) international studies and most have agreed that the Kaveria Delta was prominent. Besides the Tamil civilization is known all over the world so would there be anything wrong with saying that the Chola empire was one of the best in India. Not all kingdoms were born equal. We should be proud (including non-Tamilians) of this Chola empire because it is INDIAN
(by the way, I am not Tamil, just mentioning it before everyone assumes i am degenerating other people)
