I wonder if it's a side effect of prosperity. If you're poor, you depend on your broader family and community -- when you run out of money, when your car breaks down and your uncle can fix it, etc. etc. and if you have to sleep in the same room as your extended family, you're going to have "community."
However, dealing with people is difficult and inconvenient, so when you have money you decide to leave your family and isolate yourself from other people's problems as much as possible. You perhaps gain more peace, privacy and free time, but it's harder to notice what you're losing.
I'm not going to dredge up the numbers now, but in the 60s in America, I think it's probably safe to say a lot more siblings lived in the same room, a lot more people lived in small independent farms working alongside many family members, etc. etc. People were closer together because they had to be. People in cities didn't have to be quite so adjacent, but perhaps they were closer because it was normal in society to be closer.
Speculation on my part, but it probably wouldn't be hard to find those numbers and back up the argument...
However, dealing with people is difficult and inconvenient, so when you have money you decide to leave your family and isolate yourself from other people's problems as much as possible. You perhaps gain more peace, privacy and free time, but it's harder to notice what you're losing.
I'm not going to dredge up the numbers now, but in the 60s in America, I think it's probably safe to say a lot more siblings lived in the same room, a lot more people lived in small independent farms working alongside many family members, etc. etc. People were closer together because they had to be. People in cities didn't have to be quite so adjacent, but perhaps they were closer because it was normal in society to be closer.
Speculation on my part, but it probably wouldn't be hard to find those numbers and back up the argument...