I found, in a promoted Tweet, a blog posting by Sandra L. Richards on “Black Mom’s Blog” that echoes the idea “it takes a village” to raise a child. The title is “When raising children becomes a family affair”.
The posting gets quite detailed on the social interaction of a child with other nuclear families within a network of relatives an "friends", getting into areas like sleepovers.
I even recall, working in census, encountering a family that expressed that view, that older siblings must learn pre-parenting skills in taking care of younger brothers and sisters, and implementing this process was one of the perks of married parenthood.
This idea has a big time implication for the potential social responsibilities of childless people for "OPC", other people's children (especially within an extended family). It also fits indirectly into the paid family leave debate.