Self-efficacy, self-in-relation, mitaku oyasin, Erickson's generativity, concepts and moral standards central to most cultures, until big business took over. Since the industrial revolution there has been a growing disconnect between sense of self and sense of community, of social attachment. Attachment disorder isn't something talked about on a societal scale, but it exists. And so yes, definitely a sense of self in terms of one's value to community is essential to mental health. Otherwise you have the classic antisocial.