The most feminine country in the world

Can you guess which country is the most feminine in the world? Yes, it’s Sweden, according to Staffan’s Personality Blog.
Staffan notes a couple of interesting peculiarities. One is that some of the WEIRD (Western, Educated, Industrial, Rich, Democratic) countries are quite feminine – Scandinavia and the Netherlands – and some are not – U.S., Australia, for example. He speculates that this due to genetic influence.

The other aspect worth noting is that in Sweden, criticism of feminism is beyond the pale.

So, from some of the fiercest people on earth, Vikings, to some of the most feminine, a story perhaps worthy of Gibbon, if it could be told.  How did it happen?