A large-sized district in India is larger than about eighty (80) nation-states in the world in terms of population. Most of our larger states would be among the large nations of the world. Uttar Pradesh, Bihar, Maharashtra and West Bengal - each would be the largest nation in Europe if independent. Even a truncated Uttar Pradesh would be the world's sixth largest nation!
Given these mind-boggling demographic realities, coupled with unmatched diversity, our centralized, somewhat imperial style of governance is archaic and ineffective.