Rurikids
History

Rurik and his brothers founded a state that later historians called Kievan Rus′. By the middle of the twelfth century, Kievan Rus′ had dissolved into independent principalities, each ruled by a different branch of the Rurikid house. The dynasty followed agnatic seniority and the izgoi principle. The house underwent a major schism after the death of Yaroslav the Wise in 1054, dividing into three branches on the basis of descent from three successive ruling Grand Princes: Iziaslav (1024–1078), Sviatoslav (1027–1076), and Vsevolod (1030–1093). In addition, a line of Polotsk princes assimilated themselves with the princes of Lithuania. In the 10th century the Council of Liubech made some amendments to a succession rule and divided Ruthenia into several autonomous principalities that had equal rights to obtain the Kievan throne.

Vsevolod's line eventually became better known as the Monomakhovichi and was the predominant one. The line of Sviatoslav later became known as Olegovychi and often laid claim to the lands of Chernihiv and Severia. The Izyaslavychi who ruled Turov and Volhynia were eventually replaced by a Monomakhovychi branch.

According to Jaroslav Pelenski,

The 'Riurikide' dynasty and the ruling elite... attempted to impose on their highly diverse polity the integrative concept of russkaia zemlia ('the Rus' land') and the unifying notion of a ' Rus' people '.... But 'Kievan Rus' ' was never really a unified polity. It was a loosely bound, ill-defined, and heterogeneous conglomeration of lands and cities inhabited by tribes and population groups whose loyalties were primarily territorial.

This caused the Rurikid house to effectively dissolve into several sub-dynasties ruling smaller states in the 10th and 11th centuries. These were the Olgoviches of Severia who ruled in Chernigov, Yuryeviches who controlled Vladimir-Suzdal, and Romanoviches in Galicia-Volhynia.
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