-The Economist   The world’s population will reach 7 billion at the end of October. Don’t panic IN 1950 the whole population of the earth—2.5 billion—could have squeezed, shoulder to shoulder, onto the Isle of Wight, a 381-square-kilometre rock off southern England. By 1968 John Brunner, a British novelist, observed that the earth’s people—by then 3.5 billion—would have required the Isle of Man, 572 square kilometres in the Irish Sea, for its standing...

One week from now, the United Nations estimates, the world’s population will reach seven billion. Because censuses are infrequent and incomplete, no one knows the precise date—the US Census Bureau puts it somewhere next March—but there can be no doubt that humanity is approaching a milestone. The first billion people accumulated over a leisurely interval, from the origins of humans hundreds of thousands of years ago to the early 1800s. Adding...

Economic status, education, access to clean water and sanitation, nutrition and the environment determine the level of health of persons, communities or countries, and so does the extent to which rights are enjoyed or denied. The World Conference on Social Determinants of Health, held Oct. 19-21 in Brazil, defined 15 commitments that should be undertaken by governments, international organisations, the private sector and civil society.  The final document, the Rio Political Declaration...

Despite Gujarat's impressive growth rate, the state trails less developed ones like Orissa, Uttar Pradesh, West Bengal and Assam when it comes to malnutition. A new report places Gujarat at the thirteenth position on a list of states based on hunger. “Among the industrial high per capita income states, Gujarat (69.7 per cent children up to age 5 anaemic and 44.6 per cent malnourished) fares the worst in terms of overall...

Imagine there was one changeable factor that affected virtually every measure of a country's health— including life expectancy, crime rates, addiction, obesity, infant mortality, stroke, academic achievement, happiness and even overall prosperity. Indeed, this factor actually exists. It's called economic inequality. A growing body of research suggests that such inequality — more so than income or absolute wealth alone — has a profound influence on a population's health, in every socioeconomic...