I feel that this situation does not only apply to cities but everywhere. I believe that technology is partially to blame. When I grew up, so many years ago, the back door was always open. When guests would "pop" in, they were welcomed with an offer to eat and a place to sit and chat.
Now days, people keep each other at arms distance. It is hard to get close to others. Now, I am not against technology, by all means! I am a science teacher and technology is an important part of my curriculum. However, texting, chatting, etc. has an effect on the social aspect of today's generation.
On be aspect of being buried in the screens is not learning to properly identify dangerous people, this will lead to higher rates of various issues that make the news, educing trust further. Social skills are being lost while people believe they are socializing.
I agree.