Interesting culture. They favored larger, densely populated settlements.
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I wonder if that might indicate a defensive need due to larger than usual bands of raiders?
“I wonder if that might indicate a defensive need due to larger than usual bands of raiders?”
That’s probably how it started and that would have been a good thing.
But somebody probably noticed that their position as the leader was vastly improved by the centralization and decided to take it farther and farther until it didn’t work and caused a collapse.
There are almost no natural defensive barriers on the plains of Ukraine.