IMO, the big 'sea change' would've occurred during the 'Long Night'.

The cultures that were the most nimble, agile, & adaptable would've done the best.

It's no surprise that the vargr ended up transforming so much of what had been vilani space into their own.
I figure that the 'Long Night' served to facilitate rather hinder vargr depredations.

Heck, Vland itself probably would've fallen too if the 3I hadn't arrived to bale them out & stabilize the frontier.

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On Monday, September 14, 2020, 09:14:58 PM MST, Richard Aiken <xxxxxx@gmail.com> wrote:

I don't know about anyone else.
But I find it very hard to keep straight who's saying what in this thread. The quoting set-up isn't the usual one and that's confusing the heck out of me.
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BTW, IMTU I divided the canon timeline by a factor of five from contact with Terra onward. The Solomani simply aren't as stick-in-the-mud as the VIlani. So it's only been about three centuries since the First Empire fell . . . and - to hear the Vilani tell it - it never actually fell at all, at least not in VIand Sector. :)