Something the article talks about is how morality is engendered not found. That the community teaches morality and that we need this or there are gaps in our humanity. Considering how we treat others is a learned skill it is also a taught and reenforced skill. How do we as a society wish our youths to treat each other? We need our systems to engender that.
Geezer reaction: If only this was ~1945 - ~1965 America, I'd say to find a nice little Protestant church* and start attending. An enormous number of such churches were either founded to meet such needs, or grew enormously during the baby boom.
(Not to say that any such churches were perfect. 50% of 'em were below average! But if you lived in a good-sized town, you'd probably have at least a few to chose from.)
*Assumpion - Roman Catholics, Jews, etc. would mentally translate this to "Catholic church", "synagogue", etc.
Nobody ever put a price tag on the value of a healthy living community, so the market is optimizing against it.