sentences:  The absence of this technology in oral societies limits the development of complex ideas and the institutions that depend on them.Instead, sustained thought in oral settings depends on interpersonal communication, and storing complex ideas over a long period of time requires packaging them in highly memorable ways, generally by using mnemonic tools.In his studies of the Homeric Question, Milman Parry was able to show that the poetic metre found in the "Iliad" and the "Odyssey" had been 'packaged' by oral Greek society to meet its information management needs.