Answer:the differences between the two major trends of Muslim have kept them opposed to each other.
Explanation:
At the death of prophet Muhammad, two denominations emerged over a disagreement as to who should become the successor of Muhammad since he did not appoint anyone.
The majority, called the Sunni, chose Abu Bark, Muhammad's father-in-law, as caliph. A minority opposing this election, the Shia, chose Ali ibn Abi Tabib, Muhammad's son-in-law and cousin as Muhammad's successor. Ever since, the differences between the two major trends of Muslim have kept them opposed to each other,
I think the father of economics is Adam Smith
The ancient Romans used their engineering skills to build aqueducts, bridges, roads, domed structures, the hypocaust heating system and any other building projects they undertook.
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