For @livemint, I looked at recent population projections for Indian states for the next 15 years, and I was struck by the generational divide that is coming up between India's north and south. Short thread follows:
Fifteen years from now, the median Tamil person will be over 40 while the median Bihari will be not yet 30. That's a considerable age gap, and it has widened further. 
I've written earlier about how fertility is declining all over the country, but Bihar isn't doing very well in pushing this decline, that is a product of rising incomes, and better access to health and education for women, forward livemint.com/news/india/as-…
Well 15 years from now, Bihar will still not have achieved replacement fertility - and Kerala did this in 1998. That means 15 years from now, Bihari women will still be having more children than women from Kerala did over a generation before
We know broadly that these processes are taking place, but it's still quite something to picture how we're going to be quite nearly generations apart. The full piece is here: livemint.com/news/india/dem…
