The Islamic civilization was able to encompass such an extensive empire for many different reasons. This civilization was very successful, because of the choice of either following Mohammed/Quaran or opposing them, showed its effort to treat everyone equally and did not force their people into a religion, and finally they seem to have a high-quality military in order to have a good explanation for conquest.

Throughout this civilization there were many different important things said such as in Document one, "Believe or else pay tribute....obey the Lord and His Apostle (Mohammed), and he will defend you....But if ye oppose and displease them....I will fight against you and take captive your little ones and slay the elder" (Document 1), which was quoted by Mohammed. When he said this he basically meant that he would most definitely defend those who followed in his path, but he will...