What causes is going to split into sunni and shia branches

The original split between Sunnis and Shiites occurred soon after the death of the Prophet Muhammad, in the year 632. ... And it was fundamentally that political division that began the Sunni-Shia split." The Sunnis prevailed and chose a successor to be the first caliph.

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. political or economical policy that isolates a country from participating in international relationships. it has been suggested that the united states participates in isolationism because of its lack of involvement in particular wars or alliances.

when people started to question traditional christian beliefs, they became criminals in the eyes of the church: they were accused of heresy and then, executed. the church held unbelievable power and anyone who tried to defy it or its beliefs, was demonized and persecuted.

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