"Urban ecosystems are extremely complex because they are composed of many different kinds of functions and intricate organizations. A city is essentially a system of systems, and it is the interactions and interdependencies of its many parts that makes it so dynamic and unpredictable. Their complexity will increase significantly given the expected urban growth over the next decades. This is why we are now looking at the use of digital technologies, information-based intelligence and sophisticated modeling and simulation to help us better manage the complex challenges involved in the daily life of a city, - e.g, education, health, safety, commerce, transportation and entertainment."
— Quote from Irving Wladawsky-Berger/s blog post: What are the Key Qualities of a Great City?