One of the biggest reasons why Islam spread is because of Trade. In the Middle East from China to Spain were the Silk Roads. The Silk Road was a trade route for the countries in Europe and the Middle East. Along the trade was a small town called Mecca. Mecca became under control of Muslim (Islam) in 632. Mecca was like the rest center of the Silk Road because all of the routes form Yemen, Egypt, China, Spain, East Africa. Over the years the other countries became under