Cities are humanity’s greatest invention. As indispensable engines for creativity, innovation, wealth, and connection, they are the loom on which the fabric of civilization is woven. But the global COVID crisis has redefined our relationship to cities in incalculable ways. How permanent are these changes? Are we on the brink of a post-urban world? In "Survival of the City: Living and Thriving in an Age of Isolation," Professor Edward Glaeser argues that city life will survive, but individual cities face terrible risks and waves of urban failure would be disastrous.