This book covers the period of 1500-2000 AD, examining the major geographical, economical and political trends that lead to the current Danish social welfare utopia, as well as the pressures it faces with modern globalization and internationalism. If you want Vikings and primitive history, this is not the book for you.
It was hugely interesting to me, as I have ancestors that come from Denmark. It helps me to understand more the time that they lived in and the circumstances of their lives. Also, as a person that skews towards the free market, it helps me to understand what is meant by "Danish socialism" - at least what it means in Denmark, as opposed to when it is invoked in an American setting.
To me, the key difference between the Danish version, and the version that would be implemented in the US, is the sense of mutual obligation. Justice is not just about administering punishment; it is about performing what is owed: that often forgotten word "Duty." My sense in the US is that the social welfare state is much more about reparations and entitlement, than any mutual sense of obligation. Society may have an obligation to help, but society has a related obligation to be as independent as they can manage. And EVERYONE needs to pay. There is no magic line to cross before your income is taxed to contribute to the national pot.
Also, as has been noted, much of Danish unity and social welfare has arisen from a unified tribal identity. Much of the rough edges have been worn off, and Denmark history for the last 150-200 years is a "little brother" role in history: smaller in power and territory than larger neighbors, there has been a strong culture of "go along to get along." Denmark has often sought unity through consensus. They have had internal and external conflicts, like any other nation. Possibly, the author smoothed over those elements in an attempt to smooth the way for his narrative interpretation of how Denmark and Danishness came to be.
Anyway, it was interesting. It started as a library book that became one I had to buy. My own copy is filled with tabs and bookmarks, and will be filled with comments and cross references.