I agree with only one point mentioned in the article.North India always suffered the brunt of invaders. They faught with various invaders and hence lost its cultural and financial property. You can say that South now is little better than North as North have been saving and protecting the whole country by fighting foreigners. If you look at the history of Indian civilization I dont come across any incidence of Southern stated doing anything for India .They always remained in their kingdom peacefully. Forgot Nalanda university ( the rich collection of Indian scriptures and knowledge)? , it was burned by Mohameddans when they invaded.
But I have one question to Rajeev, why do you think that preserving Indian culture ( as happened in South) helps in the growth ??