The tribals of Assam, particularly of the Brahmaputra valley, have historically contributed towards the emergence and growth of the Asamiya nationality and its language, literature and composite culture. A large number of tribals have identified themselves fully with the Asamiyas and have even given up their mother-tongue/dialect. The tribals in no way pose a threat to the identity of the relatively advanced Asamiyas. In fact, if any group in Assam faces an identity crisis, it is the autochthon tribals.