When teenagers bond, they create their own language from a lexicon of shared emotional experiences. Because of their inexperience, these are mostly from modern pop culture; song lyrics and movie quotes. When young parents bond with other young parents, they too develop their own language around shared emotional experiences. Anyone without those experiences is excluded from the group. Not intentionally, but because they do not speak the language.
For an entire community to be healthy and sustainable, all the members must be schooled in the same collection of stories to create a lexicon if shared emotional images. This could be a religious text like the Bible, or classic literary works such as Shakespeare. This will not remove all the spaces between adults and teenagers, or parents and non-parents, but it will create a foundation for all the members of the community to stay connected.