Are there any studies on people who grew up with similar isolated childhoods in the 20th century (as in modern-day levels, even comparing with the late 20th dec

Are there any studies on people who grew up with similar isolated childhoods in the 20th century (as in modern-day levels, even comparing with the late 20th declining average)? It would be interesting to see the similarities/differences between them and modern cohorts, and if surrounding culture made adult integration harder or easier (though I'm rather pessimistic on that). Any HNer willing to share a personal anecdote on this?