George: Yes I concluded they were just trying to sell the book,
which looks pretty thick and is probably pricy.

The illustrations used also remind me of JW literature,
which also postulates a Garden of Eden, past or future.

Does anyone still defend the idea of a matriarchal society in the past,
such as was set out by Robert Graves in his book The White Goddess?
Which I suspect is more poetry and fantasy than based on reality.

I don't think so from my readings. Using the example of American natives, called Indians mistakenly, they were stone age and patriarchal, and were in North America from almost 18-20,000 years ago.