Step-by-step explanation:
First, caliphates occupied a vast geographical area, seeking to convert non-believers. Second, Islamic scriptures set out a variety of rules that applied to issues such as property, taxes, employment, loans, etc. The end goal, according to the Quran is to prevent greed, tax the rich, and prevent the confiscation of land. So the religion spread along trade routes and carried with it an ideology rooted in both the religious and economic system. The third reason was because of the expansion of the Ottoman Empire.