Thank you for posting. He is right.
From the jacket.....
“Family and Civilization is the magnum opus of Carle Zimmerman, a distinguished sociologist who taught for many years at Harvard University.
In this unjustly forgotten work Zimmerman demonstrates the close and causal connections between the rise and fall of different types of families and the rise and fall of civilizations, particularly ancient Greece and Rome, medieval and modern Europe, and the United States.
Zimmerman traces the evolution of family structure from tribes and clans to extended and large nuclear families to the small nuclear families and broken families of today.
And he shows the consequences of each structure for the bearing and rearing of children; for religion, law, and everyday life; and for the fate of civilization itself.”
Forgot....published in 1947.