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
During the Khazar period, the territory of Ukraine was settled by Iranian (post-Scythian), Turkic (post-Hunnic, proto-Bulgarian), and Uralic (proto-Hungarian) tribes and Slavic tribes. Finally, the Varangian ruler of Novgorod, called Oleg, seized Kiev (Kyiv) and established the political entity of Kievan Rus'. Some theorists see an early Ukrainian stage in language development here; others term this era Old East Slavic or Old Ruthenian/Rus'ian. Russian theorists tend to amalgamate Rus' to the modern nation of Russia, and call this linguistic era Old Russian. Some hold that linguistic unity over Rus' was not present, but tribal diversity in language was.