The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from Taras Bulba and Other Tales by Nikolai Vasilievich Gogol:

their own faith, Greek Christianity. Prior to the Mongol invasion, which brought conflagration and ruin, and subjected Russia to a two-century bondage, cutting her off from Europe, a state of chaos existed and the separate tribes fought with one another constantly and for the most petty reasons. Mutual depredations were possible owing to the absence of mountain ranges; there were no natural barriers against sudden attack. The openness of the steppe made the people war-like. But this very openness made it possible later for Guedimin's pagan hosts, fresh from the fir forests of what is now White Russia, to make a clean sweep of the whole country between Lithuania and Poland, and thus give the scattered princedoms a much-needed cohesion. In this way