During all the first part of the Middle Ages, no other people made as important a contribution to human progress as did the Arabs, if we take this term to mean all those whose mother-tongue was Arabic, and not merely those living in the Arabian peninsula. For centuries, Arabic was the language of learning, culture and intellectual progress for the whole of the civilized world with the exception of the Far East. From the IXth to the XIIth century there were more philosophical, medical, historical, religiuos, astronomical and geographical works written in Arabic than in any other human tongue.