Rise of Islam

It's fascinating to read about the Iranian empire when it was governed by religion other than Islam. The empire that stood most ferociously against the Roman empire was the one that was governed by religion of prophet Zarathustra, who taught in believing in Aruha Mazda, the one true God. In this doctrine, the world was clearly divided into Good and evil, and choosing between these two meant how your soul is going to be judged during the judgment day. Still, no one would have thought that between the roman empire and the Iranian empire, the dominant doctrine would be something that is once again, different from these two. It was the doctrine of Islam, taught by prophet Muhammad during the 7th century. This religion gained a lot of ground very quickly partially because it was able to bring together tribes that were initially in war against each other. One fascinating aspect of Islam is that there is no distinction made between religion and state, for they are both supposed to be governed by god. After all, in Islam, there is no god but god. Also, Islam saw itself as being the next step from Christianity in that Muhammad was the next and last prophet to come from the line of Moses and Jesus. Soon the Byzantine empire would go and conquer even Constantinople, which is konwn as Istanbul today.