The Great Arab Conquests: How the Spread of Islam Changed the World We Live In - Hugh Kennedy - Google Books

https://books.google.de/books?id=nV28i9Ticz0C

Today's Arab world was created at breathtaking speed. In just over one hundred years following the death of Mohammed in 632, Arabs had subjugated a territory with an east-west expanse greater than the Roman Empire, and they did it in about one-half the…