From The Gates of Europe: A History of Ukraine, by Serhii Plokhy (Basic Books, 2017), Kindle pp. 83-86:
THE AUTHORS OF the Primary Chronicle (the laborious task of recording events and commenting on them passed from one generation of monks to another) had to reconcile three different historical identities in their narrative: the Rus’ identity of the Scandinavian rulers of Kyiv, the Slavic identity of the educated elites, and local tribal identity. While the Kyivan rulers and their subjects adopted the name Rus’, the Slavic identity associated with that name, not the Scandinavian one, became the basis of their self-identification. Most subjects of the Rurikids, who ruled their realm from the Slavic heartland, were Slavs. More importantly, the dissemination of Slavic identity beyond the Kyiv region was closely associated with the acceptance of Christianity from Byzantium and the introduction of Church Slavonic as the language of the liturgy, sermons, and intellectual discourse of Rus’. Christianity appeared in both the Slavic and non-Slavic parts of the Kyivan realm in the garb of Slavic languages and Slavic culture. The more Rus’ became Christian, the more it turned Slavic as well. The Kyivan chroniclers incorporated local history into the broader context of the development of the Balkan Slavs and, more broadly still, into the history of Byzantium and world Christendom.
On the local level, tribal identity gave way slowly but surely to identification with local principalities—the centers of military, political, and economic power associated with Kyiv. Chronicle references to the lands surrounding princely towns replaced references to indigenous tribes. Thus, the chronicler refers to the army that sacked Kyiv in 1169 as consisting of people from Smolensk instead of Radimichians, residents of Suzdal instead of Viatichians or Meria, and natives of Chernihiv instead of Siverians. There was a sense of the unity of all the lands under the rule of the Kyivan rulers, and despite conflicts and wars between Rurikid princes, the inhabitants of those lands were considered “ours,” as opposed to foreigners and pagans. The key issue was recognition of the authority of the Rus’ princes, and when some of the Turkic steppe nomads accepted that authority, they became referred to as “our pagans.”
The political and administrative unification of the diverse tribal territories entailed the standardization of their social structure. At its very top were the princes of the Rurikid dynasty, more specifically the descendants of Yaroslav the Wise. Under them were members of the princely retinue—originally Vikings but also increasing numbers of Slavs who merged with local tribal elites to form the aristocratic stratum called the boyars. They were warriors, but in times of peace they administered the realm. The boyars were the main landholding class, and depending on the principality, they had greater or lesser influence on the actions of the prince. Church hierarchs and their servants were also among the privileged.
The rest of the population paid taxes to the princes. The townspeople, who included merchants and artisans, had some political power that they exercised at town meetings, where they decided matters of local governance. Occasionally, as in Kyiv, or quite regularly, as in Novgorod, such meetings influenced the succession of local princes. The peasants, who accounted for most of the population, had no political power. They were divided into free peasants and semifree serfs. The latter could lose their freedom, usually because of debts, and reclaim it once they had paid their debts off or after a certain period. Then there were the slaves—warriors or peasants captured in the course of military campaigns. The enslavement of warriors could be temporary, but that of peasants was permanent.
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The change in the geopolitical aims of the Kyivan princes, from Yaroslav the Wise to Andrei Bogoliubsky, reflects the reduction of their political loyalties from the entire realm of Kyivan Rus’ to a number of principalities defined by the term “Rus’ Land” and eventually to peripheral principalities that grew strong enough to rival Kyiv in the twelfth and early thirteenth centuries. Historians look to those principality-based identities for the origins of the modern East Slavic nations. The Vladimir-Suzdal principality served as a forerunner of early modern Muscovy and, eventually, of modern Russia. Belarusian historians look to the Polatsk principality for their roots. And Ukrainian historians study the principality of Galicia-Volhynia to uncover the foundations of Ukrainian nation-building projects. But all those identities ultimately lead back to Kyiv, which gives Ukrainians a singular advantage: they can search for their origins without ever leaving their capital.
Far Outliers 