Almost every claim about the family — that it is in decline, that it has been transformed, that something has been lost — is a comparison. And the comparison is almost always with a particular arrangement that people believe was the norm for centuries.

It was the norm for about thirty years, in a small number of countries, under conditions that no longer exist.

And the account of what preceded it, which was standard in sociology for decades, turned out to be wrong — demonstrated wrong by counting, which is why this lesson is also a demonstration of what 7.6.1 said about description.

The variation

The thirty-year family

What the theory said, and what survives