As for people having always been de-socialised, yes I am sure it's always been so for some, but something has changed. I'm also old enough to have traced it. What's changed imho is acceptability. It's great that we're a more tolerant society etc. But we used to value good manners, Today I think we see them as a weakness and treat assholes as if their behaviour was quite acceptable but "unfortunate". I think digital technology has played a large part in that.