There's a fascinating / scary / terribly sad article in today's New York Times magazine: An Elephant Crackup? It is primarily about African elephants, but it mentions Indian elephants as well; and the problems are apparently evident among all elephant populations:
... today’s elephant populations are suffering from a form of chronic stress, a kind of species-wide trauma. Decades of poaching and culling and habitat loss, they claim, have so disrupted the intricate web of familial and societal relations by which young elephants have traditionally been raised in the wild, and by which established elephant herds are governed, that what we are now witnessing is nothing less than a precipitous collapse of elephant culture.
It has long been apparent that every large, land-based animal on this planet is ultimately fighting a losing battle with humankind. And yet entirely befitting of an animal with such a highly developed sensibility, a deep-rooted sense of family and, yes, such a good long-term memory, the elephant is not going out quietly. It is not leaving without making some kind of statement, one to which scientists from a variety of disciplines, including human psychology, are now beginning to pay close attention. ...