History of Ukraine
Strikingly different interpretations of the medieval state of Kievan Rus' appear in the four schools of historiography within Ukraine: Russophile, Sovietophile, Eastern Slavic, and Ukrainophile. The Sovietophile and Russophile schools have become marginalized in independent Ukraine, with the Ukrainophile school being dominant in the early 21st century. The Ukrainophile school promotes an identity that is mutually exclusive of Russia. It has come to dominate the nation's educational system, security forces, and national symbols and monuments, although it has been dismissed as nationalist by Western historians. The East Slavic school, an eclectic compromise between Ukrainophiles and Russophilism, has a weaker ideological and symbolic base, although it is preferred by Ukraine's centrist former elites.
Ukrainian language
In the 19th century, the question of whether Ukrainian, Belarusian and Russian languages are dialects of a single language or three separate languages was actively discussed, with the debate affected by linguistic and political factors. The political situation (Ukraine and Belarus being mainly part of the Russian Empire at the time) and the historical existence of the medieval state of Kievan Rus', which occupied large parts of these three nations, led to the creation of the common classification known later as the East Slavic languages. The underlying theory of the grouping is their descent from a common ancestor. In modern times, Ukrainian, Russian, and Belarusian are usually listed by linguists as separate languages.