To undergraduates of Western origin, one of the mostalien aspects of Islamic history is the role playedin it by tribes: why did they never disappear ? Toseasoned Islamicists, on the other hand, it is thevirtual disappearance of tribes from Europe afterthe age of invasions that is puzzling: why are thereno Ḥāshid and Bakīl in Switzerland ? Who couldimagine the Yemeni highlands or the Caucasus asplaces renowned for banks and cuckoo clocks ? Thoughtribes were prominent in many parts of Asia, theydid not play the same role in Chinese and Indiancivilisation either as they did in the Muslim MiddleEast; nor is it obvious that they played the samerole in the Middle East before the rise of Islam asthey did thereafter. It is hardly surprising, then,that Islamicists talk so much about tribes thatnon-Islamicists often suffer from the misconceptionthat there is nothing but tribes in the Islamicworld.