WI: Eastern Europe without the Mongols

I know, It's probably been done 9,000 times already, but here I go...

...Assuming that Genghis Khan is unable to unify Mongolia, or else fails (somehow) to defeat the Rus, what long-term political and economic changes do you see Eastern and Central Europe undergoing? I doubt there is any single answer to this question, so take it wherever you wish.

Oh, and you might want to bring a butterfly net...
 
No Tartars, so the population of Muslims within Russia and possibly Northern Central Asia will be significantly less if not nearly non-existent. On the flip side, though, the Mongols don't crush the Turks in Anatolia, so that could mean an earlier overrunning of the Balkans.
 
Lots of political marriages between Greeks and Slavs, and especially Rus nobility. The Rus with basically feudal by that point so if the Byzantines start meddling in the politics there things could become very interesting and different from OTL.
 
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