REally? didn't the Byzantines? There weren't any Muslims at the time.
What contribution did the Normans and the Gauls make during the years after the fall of the Roman empire?
Admittedly, without the Scottish Enlightenment, we would all still be living in the sh!t of the monarchy, and Islam would still be a problem, but there did exist a golden age of Islam.
Ah -- ever heard of a thing called THE LIBRARY of ALEXANDRIA which was the repository of ancient knowledge collected by the Greeks and burnt to the ground by those following Islam?
I still haven't forgiven them for that.