“The greatest challenge we have today is that we have a world that is pushing back on rights,” said Dr. Babatunde Osotimehin, executive director of the United Nations Population Fund (UNFPA), at the Wilson Center. [Video Below]

“You can’t build a peaceful world on an empty stomach,” Secretary of State John Kerry said yesterday at a high-level working session on resilience and food security, quoting Norman Borlaug, the father of last century’s “Green Revolution.”

As presidents, prime ministers, and other policymakers from across the continent gather in Washington, DC, this week for the first-ever U.S.-Africa Leaders Summit, what are the issues to watch?

As global environmental change accelerates, understanding how population dynamics affect the environment is more important than ever. It seems obvious that human-caused climate change has at least something to do with the quadrupling of world population over the last 100 years.

The time has come for us to collectively reexamine – and ultimately move past – the concept of sustainability. The continued invocation of sustainability in policy discussions ignores the emerging realities of the Anthropocene, which is creating a world characterized by extreme complexity, radical uncertainty, and unprecedented change. From a policy perspective, we must face the impossibility of even defining – let alone pursuing – a goal of “sustainability” in such a world. It’s not that sustainability is a bad idea. The question is whether the concept of sustainability is still useful as an environmental governance framework.

Asia is going through an unprecedented wave of urbanization. Secondary and tertiary cities are seeing the most rapid changes in land-use and ownership, social structures, and values as peri-urban and agricultural land become part of metropolitan cityscapes. All the while, climate change is making many of these fast-growing cities more vulnerable to disasters.