Sociologists and anthropologists, being generally socialist types in the Boas school of cultural determination, have viewed the nuclear family - mum, dad and the kids - as a modern construct. It is said that the Industrial Revolution broke up extended families, atomising consumption and labour.
However in their paper published in the Journal of Archaeological Science (doi:10.1016/j.jas.2014.12.018) Randolph Donahue and Anders Fischer report upon the discovery of an 11,000 year old home-remains from the Neolithic period. The home was at Trollesgare, Denmark, on the edge of a freshwater lake. It belonged to a man and a woman and two children. They had no neighbours and lived very much alone. The man did the hunting and made tools and weapons from stone. The woman looked after the home and made warm clothing. The roles complemented each other.
It sure sounds better than what we are living under today. If I could have my time over again, and my time is almost over, I would rather live in those times then in the cesspool of modernity. What has modern world given us in replace of taking away that which made us truly human; a sense of place, and being with kin and tribe in a place to call their own, rather than living in the supermarket that the modern state has become.