Oh no, feudalism is discussed again. It's 3rd time probably, over the last few years.
Just use search engine.
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I have a new issue to mention - how arbitrary can sometimes archaeology be ("this ancient pot is ours and is superior to your pot").
Here is a nice passage on how nationalist and racist attitudes, which were changing over time, affected theories of Romanian archaeology:
[Note: Nestor mentioned in this text is not a Medieval Russian chronicler, but a 20th century Romanian archaeologist]:
Of course Romanian archaeology is just an example. Similar tendencies could be found in all other European archaeologies in the 20th century.
Early Slavs were so far attributed all levels of militarization: they were described by some as unarmed farmers, peacefully colonizing half of Europe, by others as primtive but still dangerous savage barbarian warriors devastating everything on their way (that's actually how ancient written sources describe Slavic invasion of the Balkans; but later various scholars tended to question that, claiming that Slavs only settled as unarmed subjects of Avars, etc.).
Other scholars of course adopted various intermediate levels of militarization between "none" and "extreme", as mentioned above.
Slavic expansion is one of the greatest mysteries in European history because every branch of science tends to explain their origins differently.
Some people even tend to ignore the linguistic aspect of the ethnogenesis of Slavs (Florin Curta recently), but it's rather a wrong path to follow. A lannguage is a language and it cannot emerge just like that over vast territory, without any migrations (that's what Curta seems to assume,).
From linguistic evidence it seems that the original homeland of Late Common Slavic speakers was Belarus, but archaeology points to Ukraine along the Dnieper. On the other hand, genetics point to Central Europe (according to some at least). History records them at the Danube River first.
20th century ideas about Slavic inferiority to Germanic, Romance & Greek peoples also influenced studies on the Slavic origin and expansion by Non-Slavic scholars. One example is precisely Romania, where at one point cremation burials were seen as evidence of Slavic presence, and at another point as evidence of returning by locals to Pagan rituals from times before Roman conquest of Dacia. At one point Slavs were seen as the ruling class over native Romano-Dacians, at another point as savages who migrated to Balkan territory and became the lower class, learning civilization from Romano-Dacians (Vlachs). Etc.