The referendum in Crimea is in the books, and unless significant American (unlikely) and international (somewhat more likely) pressure causes Russia to bend back from Vladimir Putin's stealth land grabs (which just might continue), we might see more expansion in the works.
The reality is, though, that the borders of the world are drawn in blood, and those borders are constantly changing. We are somewhat used to the Western Hemisphere's general geographical stability (the only switcheroo I can recall in recent memory is when Canada carved the territory of Nunavut out of the Northwest Territories in 1999), but nations change in Africa like antes do in a poker game with my friends. The hotcakes flip especially in the European lands.
Nothing lasts forever. If it's stability you're wanting, don't look to geopolitics.
To wit, here's the interactive map to prove what I just mentioned: http://loiter.co/v/watch-as-1000years-of-european-boarders-change/
Enjoy, and do some serious thinking while you're at it.