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@3RU7AL
For sure, family is one of those words that lacks precise definition. Though the more detached from the nuclear family one gets, the more the family becomes just a group of individuals. Often only bound by oppression and fear, which do not necessarily guarantee loyalty.
And military organisations and mafia only exist because of lack of consensus in society.
And I'm not sure if right and wrong or agreement are the issues as far as the individual is concerned, I would suggest that it's more a case of survival instinct. Therefore consensus isn't necessary.