Resiliency is everywhere today. Governments around the world are thinking about how to make their infrastructure adaptable to the stresses and shocks of a changing world. Yet, because many federal governments’ attention is stretched thin, compounded by budget issues and political debate, much of the necessary work of resilience is falling to cities—and within cities, to chief resilience officers. In 2013, the Rockefeller Foundation started an initiative called 100 Resilient Cities to give 100 cities across the globe the tools