Study claims modern farming threatens nomadic cattle herding.  Nomadic herders who move their cattle ceaselessly across some of the harshest environments in the world in search of grazing land are vital for Africa’s economic prosperity, but their way of life is being undermined by governments, conservationists and large-scale farmers, according to a study. Millions of hectares of land traditionally used by pastoralists in Ethiopia, Senegal, Mali, Chad, Kenya and other...

At the edge of Killai, a village on India’s southeast coast, there is a collection of 163 concrete houses, single-story blocks set in neat rows and surrounded by open fields. This is the neighborhood of M.G.R. Nagar, named after M.G. Ramachandran, a much-beloved actor and former chief minister in the state of Tamil Nadu. M.G.R. Nagar was built by aid agencies after the 2004 tsunami. It is home to around 300...

THANTIRAYANKUPPAM, INDIA — Five years ago, I woke up on a Sunday morning, checked the news online and saw that a tsunami had hit my part of the world. Early reports were sketchy. I read about just a few casualties (in Sri Lanka, as I recall), and I remember thinking that the whole thing sounded exciting. I went down to the beach, about a 15-minute drive from my house. I walked...