The topics of urbanisation, concrete jungles, and the weakening of community connections and integration necessary for thriving have been a major concern of modern times. The city is a desirable place but also known for its tendency towards corrosive loneliness: somehow as we pile up in increasingly crowded we also learn to avoid each other and communal intimacy. Humans are strange creatures.
I have observed this as Dar es Salaam and I grow up together. It started out with a tiny and very short CBD which branched out to suburbs where nobody had fences.