The city has restarted. It is moving. It looks ahead. She has to do, to move forward, to plan, to take care of others and herself. It is always her: progressive, generous, activist, entrepreneurial, international, obnoxious, snobbish, exaggerated. The city regenerates and consumes, operates from below and builds high, dismantles crime and tradition. It is finance and real estate speculation. It is branding. Bike lanes, culture, ethical food, new neighborhoods, housing prices up 40 percent, uninhabitable public housing, 700,000 cars coming in every day, ever-increasing commuters, off-market student beds. A washing machine that centrifuges its inhabitants. It attracts them, welcomes them and after 15 years spits out 60 percent of them. But the city is a complex system. If, in physics, a complex system is defined as a whole that acts and evolves according to a logic that cannot be reduced to the sum of its parts, Milan must be seen in its molecular tangle composed of multiple elements: physical, social, economic, cultural, human, all closely connected and intertwined. A complex system. A complex organization that is self-determining and determines an evolution of individual and collective choices.