Cities are birthplaces of civilization—centers of culture, trade, and progress; cauldrons of opportunity; and soon, home to 80 percent of the world's people—and they bear the brunt of megatrends like climate change, resource depletion, population growth, mass migrations, and broad inequalities of income, education, and health services. Urban planner Jonathan Rose—the man who "repairs the fabric of cities"—here distills a lifetime of experience into a model for how to design and reshape our cities to equalize their landscape of opportunity. He argues that cities can be fine-tuned to create social harmony, with systems that steer development toward equality, resilience, adaptability, well-being, and the balance between civilization and nature.