Reposting as it is on point.

“ Proximity, unplanned encounters and the privacy to confide with someone have been identified as key factors in making friends as an adult.[cite]”

Factors that make it difficult for Americans to make friends as they age:

1. Isolation driven by car culture.

2. Un-walkable communities outside cities.

3. Media driven self absorption vitiating real world interaction.

4. Political and social siloing as a result of #3.

“Bowling Alone” by Putnam was prescient by did not offer any realistic solutions.