Today, the world's cities face a range of challenges major spatial, economic, demographic, ecological, cultural and social challenges to the extent that a turning point has been reached. Widespread inequality and social exclusion on the one hand are opposed to a world where companies cluster and connect with start-ups, business incubators and accelerators on the other.

Planning and policy have good experience in handling this new built environment, but the real challenge for this post-urban-political world is to contribute to improved wellbeing by building social capital...