Abstract
This chapter proposes a new and more coherent interdisciplinary prehistory of the Andes, based firstly on a long overdue re-examination of the relationships between the various regional ‘dialects’ within the Quechua language family; and secondly on a more satisfactory correlation with the archaeological record. The founding principle is that language families necessarily reflect past expansive processes, whose traces should also be clear in the archaeological record. It provides a logic by which to assess correspondences between archaeological and linguistic patterns, on the three levels of when, where, and why particular language expansions occurred. In the Andes, the horizons thus offer the most natural explanations for the major Quechua and Aymara dispersals. With the Incas too late for the time-depth of either family, the Wari Middle Horizon emerges as the most plausible candidate for the first major expansion of Quechua, and not of the Aymara family, here tentatively associated with the Early Horizon instead.