There is widespread agreement, and untold publications, that argue urbanization is the defining issue of our time. There are more cities, both large and small, and more people living in those cities than anytime in human history.

Population projections undergird many important policy decisions, from the U.S. government’s Feed the Future program to the Sustainable Development Goals. But they’re not as straightforward as they appear. Demographers often base their estimates on complicated assumptions that aren’t obvious to the end user.

“There is no magic bullet or solution to resolving climate change quickly,” said the Population Reference Bureau’s Jason Bremner at the Wilson Center on October 28. “Our next 100 years will be far different from the last 100 or the last 1000…and it has become clear that nations will have to pursue many strategies in order to reduce emissions, build resilience, and adapt.” [Video Below]

As climate change upends established patterns of life, resilience – the ability of social and ecological systems to mitigate, endure, and adapt to short-term shocks and long-term stressors – has become a buzzword in development and humanitarian circles. [Video Below]

Climate change and conflict – what’s the relationship? In a recently completed set of field-based studies for USAID, the Foundation for Environmental Security and Sustainability set aside “yes-or-no” questions about whether climate change causes conflict and replaced them with pragmatic and politically informed questions about how climate change is consequential for conflict in specific fragile states.