Jumu'ah Nasiha-How Islam Spread

Islam, in the tenth century, was the main religion, or at least, the religion of the majority of nations in an area covering more than half of the civilized world stretching over three continents from the Pyrenees and Siberia in West and North Europe to the farthest end of Asia, up to China and New Guinea in the East; from Morocco in North Africa to the southern tip of Africa, covering two-thirds of the African continent.