I meant peace internally, not externally. Certainly, they were a profoundly aggressive, conquering empire. On the other hand, for centuries they treated the con

I meant peace internally, not externally. Certainly, they were a profoundly aggressive, conquering empire. On the other hand, for centuries they treated the conquered cultures much better than the Romans ever did, which was one of the keys of their success. Don't mistake classical Islam for contemporary Islam. Different beasts.