Even in a dense city like Paris, which has more than 21,000 residents per square mile, the concept as laid out by the Hidalgo campaign group Paris en Commun is bold. Taken at a citywide level, it would require a sort of anti-zoning—“deconstructing the city” as Hidalgo adviser Carlos Moreno, a professor at Paris-Sorbonne University, puts it. “There are six things that make an urbanite happy” he told Liberation. “Dwelling in dignity, working in proper conditions, [being able to gain] provisions, well-being, education and leisure. To improve quality of life, you need to reduce the access radius for these functions.” That commitment to bringing all life’s essentials to each neighborhood means creating a more thoroughly integrated urban fabric, where stores mix with homes, bars mix with health centers, and schools with office buildings.