I agree with where you're coming from. I think its the continuing rise of individualism to a degree; sports team mentality politics/the internet/phones/social media have likely accelerated it but feels to me we'd been moving that way even prior to that. There's probably something there, too, about how more wealth gives people an out to not have to engage with broader society in a way where lower wealth or less unequal distribution of wealth doesn't.

Margaret Thatcher got quite a lot of stick for her quote about how there is no society and its just individual people that look out for themselves first and foremost before anything. But I'd say there's more truth to that than I'd want to believe. What stops that from being true to my mind is people being very intentional about creating a society by engaging with others.

I'm always interested in people's stories about adult friendships or loneliness crisis etc. and what I tend to see is that when people start being intentional about engaging, it usually ends up with them finding new friends. It's just easy to sleepwalk, with everything going on, into not engaging. Newish parents are very apt example of this