Sub-Saharan Africa is not only the fastest growing region of the world demographically but is also one of the most vulnerable to climate changes, according to many measures, and already facing natural resource scarcity in many areas. These factors combine with existing development challenges to create security threats that African governments and the United States should be concerned with, says ECSP Director Roger-Mark De Souza in a presentation for the Africa Center for Strategic Studies’ introductory course on demography and the environment at the National Defense University.

The demographic dividend – the idea that a decline from high to low rates of population growth can lead to dramatic economic gains – has become something of a buzzword in development circles. Sub-Saharan Africa holds the single largest block of remaining high fertility countries and while headlines tend towards the dramatic about demographic shifts there, less column space has been devoted to examining the underlying issues causing these shifts or the other changes that will be necessary for countries to benefit from them.

In a recent post on the new United Nations population projections, I discussed the risk in assuming that countries in sub-Saharan Africa will progress through the demographic transition at a pace similar to other regions. Making this assumption is questionable because fertility decline in Africa has generally proceeded more slowly than in other parts of the world, with several cases of “stalls” and even small fertility increases over time.

Cambodia to grow by nearly one-third by 2050; Kenya to more than double; Mali to swell to three times its current size. These were the population projections available when Feed the Future, President Obama’s global hunger and food security initiative, was beginning implementation in 19 focus countries around the globe in 2010.

“Today we have a golden opportunity to use respectful maternal care to break new ground at the intersection of health and human rights,” said Lynn Freedman, director of the Averting Maternal Death and Disability Program and professor of clinical population and family health at Columbia University, at the Wilson Center.

October 31, 2011, was notable not only for the annual ritual of candy and costumes, but also for its designation by the United Nations as the date when global population reached seven billion. Although just an estimate – demographers are not able to count individuals in real time on such a large scale – the event was an important opportunity to present population trends to the media and public dialogue. Several babies born that day were named the “seven billionth;” in Russia, where various incentives have been implemented to try to boost an ultra-low fertility rate, Vladimir Putin visited a maternity ward to greet one of them.

“Cooperative nurturing is the natural state of humans,” said Anthony Costello, director of the University College London’s Institute for Global Health, during a side event yesterday here at the Women Deliver conference in Kuala Lumpur. Children and mothers are healthier when they have a support network, so the Institute for Global Health has partnered with a number of NGOs over the last two decades to form thousands of community-based women’s groups in Bangladesh, India, Nepal, and Malawi.

“The combined effects of rapid population growth and climate change are increasing food insecurity, environmental degradation, and poverty levels in Malawi and Kenya,” said Clive Mutunga, a senior research associate at Population Action International (PAI).