I don't expect something like that to form anywhere aside from very remote villages where people tend to stay for most of their lives. In a modern city interact

I don't expect something like that to form anywhere aside from very remote villages where people tend to stay for most of their lives. In a modern city interactions are probably too fleeting, people change location too often. Strong relationships need time to form. So people leave and only the closest family members and friends remain in contact. Even with Facebook. I believe this is a main driver for why you generally don't see large families in the western sphere anymore.