The size of the effect is astounding. Cross-class friendships are a better predictor of upward mobility than school quality, job availability, community cohesion or family structure. If these results are true, then we have largely ignored a powerful way to help people realise the American dream.
Many social goals are best accomplished indirectly; singles parties are never the best singles parties, dinners devoted to a discussion topic rarely produce good conversation; you’ve got to cultivate the conditions, not demand the behavior
Human lives in communities. We join them, we sometimes leave them. Social networks should only be an underlying infrastructure to support our communities. Social networks are not our communities. Social network dies. Communities migrate and flock to different destinations.
Not everyone who joined a bowling league (when people did such things) loved bowling. Many loved being with other people first and bowling came second or not at all. Being together is what mattered. The venue did not.