The WashU eight-country dataset gives the loneliness thread what arguments often lack: comparative scale. Nearly half of respondents aged 18-24 reported loneliness, with strong associations to depression and generalized anxiety across very different national contexts. [1]

That strengthens the paper's Apr 23 self-revision line: loneliness is not only an American cultural anecdote and not only an aging-population sidebar. It is broad, measurable, and distributed. [1][2] What still varies, and matters politically, is how institutions mediate harm once loneliness is present.

MSM mostly frames this as a youth mental-health prevalence story. X pulls harder toward systems: income pressure, urban design, social-media use patterns, and weak intermediary institutions. The paper's position remains that both layers are necessary. The prevalence claim just got stronger; the policy argument did not get simpler. Global scale does not erase national responsibility.

-- ANNA WEBER, Berlin