Thanks, this is actually very clarifying! In short:

Your link leads to a NYT article.

The NYT articles references a scholarly article from 2007.

The scholarly article is paywalled for me BUT was also published and is still available as a discussion paper at London School of Economics. This is where this map is from. See: https://eprints.lse.ac.uk/33152/1/sercdp0009.pdf

However, the discussion paper and its map are, in turn, based on a book and map by Todd (1990). Todd’s original map is actually intended to show medieval family structures. But it is based on census data from the 1950’s and 60’s, which has been cross-checked against “a very large number of historical monographs” to better reflect medieval conditions.

So the colour codes of the map are not at all intended to show current conditions! (But, interestingly, the 2007 article claims that the old medieval patterns correlate with many other, modern regional differences). This would explain all the confusion! Thanks again for the link, wishing you a nice day!

Interesting, thanks for the info! If the data really is about family structures I would guess it is even older, feels like a more agriculturally based economy where inheritance of the family estate (farm?) and such was a more central facor in the formation of families.

Hmm, yes, good idea, but then former Yugoslavia would have been united?

Edit: ok I get it, it could be old colour data transposed on current borders

Hi again! No, it certainly doesn’t! To start with something, among many errors, light yellow would be way more extended.

Hi there! I’m sorry but your map and the colour codes doesn’t correspond to reality at all. I live in one of these regions and I’m familiar with many of them. I’m afraid this is just nonsense and I wouldn’t even know where to start responding to this. Maybe you should check your sources and find new and more reliable sources of information? Kind regards and best wishes!

I don’t understand how this a question? Socialism does work, everyday, in many places and certainly doesn’t need war or famine.