1) I'm going to guess that what my grandparents meant by "lonely" isn't quite what my generation or yours, means. I think we use this as a relative term - "less connected than other people" to at least some extent. So that might skew longitudinal statistics. If you only had two friends to talk to (almost every day) in the village back then, you were lonely, and probably being ostracized to boot.<p>2) To a significant extent, it's possible to translate "I'm lonely" into "I'm too disgusted with the ethics, crudity, vile political opinions, manners, dress, accents, musical tastes, spiritual nonsense, etc of the people I meet these days to go out of my way to meet them again, thanks." This may be a downside to diversity (for those too-easily put off), or a reflection of the fact that we're all social climbers, who are too optimistic about our "social value" in the eyes of all the other social climbers, I don't know.<p>After all, almost all of us have solutions to loneliness handy if we aren't at all picky about our company. And back in the day, you couldn't be - your village was your world.<p>A hidden factor, IMHO, is the rapidity of cultural change. Last long enough (age 28 in my case) and you are necessarily a time-traveller, in a foreign culture to a large extent, and it hurts mightily to know that your tribe has moved on; but it has (unless you joined an uber-traditional church or cult as a youth.) If you opt to deny this, as many do, your world is gonna shrink and keep shrinking from that point on. You're gonna miss a lot of fun, too.<p>PS - volunteer.<p>PPS - I'm not 28, that's just how old I was when I realized I wasn't part of "the younger generation" anymore, and had to decide fast whether my generations' taste in everything was going to be forever supreme in my head, or to start making an effort to see what the real kids were up to, and whether I might like any of that, too. I chose the latter and bless that day.