Islam predominantly in the Middle and East North Africa, up to the Pacific and the Atlantic.
Step-by-step explanation:
Muslim dynasties are very fast established. Scientists from the Muslim world founded large school and university centers, libraries, where they gathered knowledge from the whole ancient world, which contributed to the golden age of Islam.
During the golden era of Islam, Islamic writing expanded and consolidated through the written word. Also, many dynasties strives for territorial expansion and embarked on the conquest, where, normally, the conquest implies the expansion of Islam.