May 10, 2012
In my decades of traveling the world, I’ve gotten to see firsthand many of the fascinating human cultures inhabiting our planet, from the Kayapó of the Brazilian Amazon to the San people of the Kalahari to the multitude of cultures of Melanesia.
Many people from these cultures, including a wide variety of indigenous peoples, live in the most biologically rich regions of our planet — regions that hold the key to maintaining global...
May 9, 2012
May 2, 2012
During the 20th century, oil played a significant role in war and conflict. Now analysts are questioning whether many future wars will revolve around another precious natural resource: fresh water. According to a panel of experts recently hosted by the Aspen Institute’s Global Health and Development program, the answer...

