The Wilson Center Policy Briefs are a series of short analyses of critical global issues facing the next administration that will run until inauguration day.

We live in a world that is different from that inhabited by our ancestors in many profound ways. Among the most important changes is that, for the first time, almost half of the world’s people live in cities. According to the United Nations, in 2008 the global urban population surpassed half of the world’s population of 6.7 billion compared with 13 percent a century ago and 3 percent a century before that. This trend will require profound changes in the way the U.S. government addresses everything from development policy to international security.

The challenges for cities in the coming century will be many, but accounting for swelling numbers of new residents – due to more open avenues of communication and flows of goods, economic opportunity, population growth, and potential climate change-induced displacement – is perhaps the biggest.

We live in an era when the pace and scope of global change – including forces such as population growth, resource scarcity, urbanization, migration, and economic development – increasingly impact all of us as individuals, from our health and security to our environment and economic well-being. This complex web of the global and local has led the Wilson Center to create a new initiative focusing on global sustainability and resilience.

Following on the news that long-time ECSP Director Geoff Dabelko is moving on to a well-deserved post directing environmental studies at Ohio University’s Voinovich School of Leadership and Public Affairs, I am thrilled to announce that I will direct a new Wilson Center initiative on global sustainability and resilience, which will combine the ongoing efforts of the Environmental Change and Security Program, Global Health Initiative, China Environment Forum, and Comparative Urban Studies Project. This new initiative will integrate and build upon their already substantial contributions to the field.