Eh there are a lot of factors, including how your city is designed. Car centric cities usually have less sense of community than cities with good transit or walkability. This is because nobody chats with the person next to them in traffic but some people will chat on the street or on the train. But on the flip side, car centric small towns can have a lot of community, mostly because the place is so small everyone kinda knows everyone and most people rely on the same businesses.
You may be interested in reading https://en.wikipedia.org/wiki/Bowling_Alone
There’s a lot to blame - dual income households, suburbanization, religion declining in popularity (religious communities are communities)
Decline in local communities sounds like a natural result of mass communication and globalization, imo
Eh there are a lot of factors, including how your city is designed. Car centric cities usually have less sense of community than cities with good transit or walkability. This is because nobody chats with the person next to them in traffic but some people will chat on the street or on the train. But on the flip side, car centric small towns can have a lot of community, mostly because the place is so small everyone kinda knows everyone and most people rely on the same businesses.