In 1904 the famous geopolitical concept of heartland vs Rimland, which was championed by the Geostrategist Nickolas Spykman and which my article of Geopolitics primarily focuses on, was put forth. According to this theory, the north-central part of Eurasia is disadvantaged compared to it's outer rim, and any political entities therein will therefore attempt to expand into the eurasian rimland, and must be contained within that area by the western world.
Russia is the preeminent power of the heartland
Heartland is so disadvantaged, not only because of it's lack of any notable resources, but also because very little movement naturally occurs between heartland and rimland. It has no real coast, it's northern coast being virtually inaccesible because of the polar icecap, it's southern and eastern borders are blocked by high mountains and harsh wilderness. It's western border is inhospitably cold.
However, as global warming occurs, it's northern and western boundaries will open. Will this allow the russians to pour into western countries? Probably not. For one, the pressure caused by the material poverty of the heartland will cease. It will no longer need to invade it's neighbours to survive, but will be able to trade with distant countries. However, this assumes russia will still exist. Russia exists as a form of organization primarily because none of her constituent nations (Muscovy, Tartary, Siberia, Yakutia) can exist independently. If these nations are enriched by trade, they won't need a unified front to be economically sustained and to invade other countries. Furthermore, it's possible russia will fraction before that. Despite Russian posturing, Russia's economy is very small and putin is the only thing holding russia's politics together