A major administrative development undertaken by Ewuare was reducing the power of the uzama chiefs which were a limiting force on the Oba. Ewuare removed their ability to appoint the Oba and instead adopted a clear succession going to the first-born son. In adopting this primogeniture lineage system, the authority of the uzama was greatly decreased. In addition, to clarify the situation, Ewuare developed the Edaiken title for the oldest son to clearly establish the lineage. One oral history dates this development to a situation in the city of Uselu. The chief of Uselu, Iken, had become an ally to Ewuare. At one point, another city was revolting against Ewuare's rule and Iken mobilized an army to end the revolt. Because he did not have anyone to rule Uselu, Ewuare sent his oldest son Kuoboyuwa to serve in the town until the war was over. Iken died in the fighting and since he had no heir, Kuoboyuwa became the ruler. This incident created a clear succession to the oldest son of the king with the title Edaiken derived from the incident.
