Answer: please form into your own words here a few reasons
When Muhammad died in 632 CE Islam grew rapidly after his death due to the caliphates occupied. vast geographical area, seeking to convince non-believers to Islam, and Islamic scriptures set out a variety of rules that applied to issues such as property taxes, employment loans, etc. Then according to the Quaran in order to prevent greed, they taxed the rich and which prevented the confiscation of land.
The first four caliphs helped the Islams overcome neighboring threats. The split between Suni and Shiite lead to the creation of the Umayyad (a dynasty of Sunni caliphs that ruled the Muslim empire until 750). Although Islam also spread peacefully through trade and cultural exchange—reaching East Africa as early as the mid-700s—these conquests further enabled the spread of Muslim civilization and had an impact on Europe, Asia, and Africa.