Examining the role of Mughira bin Sha'bah in the assimilation of Ziyad bin Ubaid's lineage to Abu Sufyan and its consequences

Ziyad bin Ubaid was one of the three sides of the triangle of Muawiya's advisers, who only served as the secretary of Basra until the end of the caliphate of the third caliph. And as soon as Imam Ali (a.s.) entered the realm of caliphate, by raising his position, he took the seat of the Emirate of Fars with huge sources of wealth. He was famous as one of the four famous Arab scholars, and by relying on his tact and intelligence, he was able to establish his position as one of the great powers of the region. But it didn't take long for him to achieve his long-standing dream and obtain the caliphate of Syria, with the mediation of Muawiyah's ambassador (Mughirah bin Sha'ba) and without paying attention to the advice of Imam Ali, he accepted to join Abu Sufyan's lineage and became Muawiyah's brother. And he thought that by accepting this annexation, he would soon be in the first circle of the rivals of Velayat Ahadi. But in the end, not only did he not reach the government of Syria, but his early death before the caliph also paved the way for Yazid's fiefdom. In this article, the researcher raises the question that what was the effect of great thought and motivation in the formation and advancement of the assimilation process and the role of the other party in .