Cities are the synthesis of thousands of years of agreements—as fragile as we are, yet wonderfully adaptable to change. As a result, they remain the ultimate ecosystem for our lives to unfold. Thanks to density, they allow us to maximize the benefits of the infrastructure, services, and public spaces we have created to sustain the well-being to which we aspire.

At first glance, all of this is in crisis today as a result of the COVID-19 pandemic. However, looking back at our history reveals far more lethal epidemics that ultimately brought substantial improvements to the way we live.