The diversity and still very strong harmony.
In America, they say that they have very different cultures in North and South. They ain't seen nothing of India, if they talk like that. Every couple of villages, the dialect changes here. Practically, every state has a completely different language. Still we all live in harmony (most of the time, anyway).
I like to blog about various topics ranging from education in IITs to social issues in India and US. All opinions and views presented here are my own and not of my employer.