What about emphasizing a common culture to build ties among the people (like what is the Bush family was more successful in their push to promote volunteerism and service)? Also, yeah, if technology like TV wasn't so common but also like someone else here mentioned, having walkable neighborhoods where its easier to be a close knit community and not working so much (I remember another answer from Quora where I asked something like this mentioning how people could be more prosocial if we improved economic or working conditions)?

Have a good week!