[sandGorgon]

that is probably the best explanation I have read yet. But it is fairly true - I really dont know why. I think religion (in its most abstract: festivities + food) has a lot to do with it. And Bollywood.

But a lot has to do with our freedom movement - the way Gandhi, Nehru and Patel unified the different kingdoms into a single freedom struggle is incredible. And that has never gone away. We actually unified India AFTER the formal independence from the British. Hyderabad's Princely State (to which I notionally belong to... and Satya Nadella ) actually wanted to be independent and was annexed by the Indian Union by force.

And now, there is so much growth and money in India, that it is really hard to make a case for Balkanization - Kashmir is an edge case with a lot of international politics. But even in the far northeast (Mizoram, etc), the struggle is for a separate federal state... only a few splinter groups demand full independence.