Russia was founded by Vikings. At about the same time Britain was massively raided and invaded by Vikings, and, across the Channel, Normandy (where Wilhelm the Conqueror is coming from) was established by Vikings. Those Vikings may have known each other or even been relatives. So, now we know whom to blame for the major part of the more than millennium of European history afterwards. Though Viking age was clearly result of the global warming of the first millennium (that warming also destroyed the Roman Empire), thus it all just a result of that climate fluctuation back then.

Another example of putting blame through 2 millennia - Space Shuttle booster width as result of the Roman chariot width https://dwanethomas.com/roman-chariots-and-the-space-shuttle...

I mean it's really Ugg's fault for hitting Ogg with that rock in 50,000BC when you get down to it.

Good examples though, worth noting that some roman road paths are still used in the UK (our new roads just went over the top) - the past is a fascinating land.