In an era rocked by climate change and other large-scale disruptions, our cities must be resilient to survive and thrive. But what does that mean, exactly? What characteristics do resilient cities share, and what can be done to cultivate them? How does resilience differ from sustainability, and where do the concepts overlap? Is resilience determined by a city’s “hardware”—its infrastructure and built environment—or it’s “software,” its political will and social capital?