Fragmentation and decline

An unconventional power succession system was established (rota system) whereby power was transferred to the eldest member of the ruling dynasty rather than from father to son, i.e. in most cases to the eldest brother of the ruler, fomenting constant hatred and rivalry within the royal family. Familicide was frequently deployed to obtain power and can be traced particularly during the time of the Yaroslavichi (sons of Yaroslav), when the established system was skipped in the establishment of Vladimir II Monomakh as the Grand Prince of Kyiv, in turn creating major squabbles between Olegovichi from Chernihiv, Monomakhs from Pereyaslav, Izyaslavichi from Turov/Volhynia, and Polotsk Princes.

The gradual disintegration of the Kievan Rus' began in the 11th century, after the death of Yaroslav the Wise. The position of the Grand Prince of Kiev was weakened by the growing influence of regional clans. The rival Principality of Polotsk was contesting the power of the Grand Prince by occupying Novgorod, while Rostislav Vladimirovich was fighting for the Black Sea port of Tmutarakan belonging to Chernihiv. Three of Yaroslav's sons that first allied together found themselves fighting each other.