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.[citation needed] Familicide was frequently deployed in obtaining power and can be traced particularly during the time of the Yaroslavichi rule (sons of Yaroslav) when the established system was skipped in the establishment of Vladimir II Monomakh as the Grand Prince of Kiev,[clarification needed] in turn creating major squabbles between Olegovichi from Chernihiv, Monomakhs from Pereyaslav, Izyaslavichi from Turov/Volhynia, and Polotsk Princes.[citation needed]
Who developed familicide?