The shift to a sedentary, urbanized lifestyle that favors processed foods over a traditional diet is building health risks among indigenous communities.

The tide of population is turning. Across the globe, countries’ populations are shrinking and aging, and most are ill-prepared not prepared for a “childless, elderly future,” writes Steve LeVine. Population growth in Africa alone will keep the global population soaring…

Aiming to understand how demographic variations impacted the efficacy of natural selection, researchers compared 2 populations that lived through the hugely significant Neolithic transition to agriculture. Demographic shifts help dictate the number and severity of…

After years of policies limiting births of girls and favoring sons, China and India face decades of work addressing the effects of their male-heavy generations. In those 2 countries, men outnumber women by 70 million—distorting the economy and paralleling an uptick in…

The world holds an estimated 7.5 billion+ people today; by 2100, that number is expected to rise to 11 billion, with the fastest growth in Africa and Asia. In June, the UN will publish new projections.

Amid all the woes in the world, Bill and Melinda Gates hang on to hope. For their annual letter, they explain why—and tackle the 10 hardest questions they get.Highlights:#1: Why don’t you give more in the US? Melinda: “We don’t compare different people’s…

For women in Pakistan, son preference increasingly influences parity progression and contraception choices, though research on the topic is slim.

Moving to the West Coast 9 years ago made a big impact on Michele Barry’s thinking about global health. Working in Silicon Valley and at Stanford University, she’s learned a lot about the importance of human-centered design. “I think you need to bring the community and all…

Last year Armenia banned sex-selective abortions, but its preference for baby boys is leading to scores of aborted girls.   Armenia has the world’s 3rd-highest rate of sex-selective abortions. 114 Armenian boys were born for every 100 girls from 2012 to 2013, compared to…

A new census in Pakistan counts 207.7 million people—a 57% increase since 1998, vaulting the nation over Brazil and making it the world’s 5th-most-populous country.   With 22 births per 1,000 people and less than a third of women using any form of birth control, Pakistan…