Social Capital

The central premise of social capital is that social networks have value. Social capital refers to the collective value of all "SocialNetworks" (who people know) and the inclinations that arise from these networks to do things for each other ("norms of reciprocity").

"social capital" refers to features of social organization, such as networks, norms, and trust (Culture), that facilitate coordination and cooperation for mutual benefit. Social capital enhances the benefits of investment in physical and human capital.

http://www.infed.org/biblio/social_capital.htm

https://www.socialcapitalresearch.com/literature/definition/

Grease for Civil Society?

heavily associated with Robert Putnam's Bowling Alone.