Both Ukrainians and Russians claim Yaroslav the Wise as one of their eminent medieval rulers, and his image appears on the banknotes of both countrie… - Serhii Plokhy

Recognition of Ukrainians as a distinct nation in cultural but not political terms in the aftermath of the Revolution of 1917 challenged that vision. The aggression of 2014, backed by the ideology of the “Russian World,” offers Ukrainians today a throwback in comparison with Soviet practices. Nation building as conceived in a future New Russia makes no provision for a separate Ukrainian ethnicity within a broader Russian nation. This is hardly an oversight or excess born of the heat of battle. Less than a year before the annexation of the Crimea, Vladimir Putin himself went on record claiming that Russians and Ukrainians were one and the same people. He repeated that statement in a speech delivered on March 18, 2015, to mark the first anniversary of the annexation of the Crimea.

The ancestors of modern Ukrainians lived in dozens of premodern and modern principalities, kingdoms, and empires, and in the course of time they took on various names and identities. The two key terms that they used to define their land were “Rus’” and “Ukraine.” (In the Cyrillic alphabet, Rus’ is spelled Pycь: the last character is a soft sign indicating palatalized pronunciation of the preceding consonant.) The term “Rus’,” brought to the region by the Vikings in the ninth and tenth centuries, was adopted by the inhabitants of Kyivan Rus’, who took the Viking princes and warriors into their fold and Slavicized them. The ancestors of today’s Ukrainians, Russians, and Belarusians adopted the name “Rus’” in forms that varied from the Scandinavian/Slavic “Rus’” to the Hellenized “Rossiia.” In the eighteenth century, Muscovy adopted the latter form as the official name of its state and empire.

Since the fall of the USSR, the Russian nation-building project has switched its focus to the idea of forming a single Russian nation not divided into branches and unifying the Eastern Slavs on the basis of the Russian language and culture. Ukraine has become the first testing ground for this model outside the Russian Federation.