Transportation corridors and political evolution in highland Mesoamerica: Settlement analyses incorporating GIS for northern Tlaxcala, Mexico

Investigations of the functional utility and social elaboration of natural transportation corridors contribute to generating more comprehensive understandings of complex macroregional phenomena such as political evolution. In this article, highland central Mexican transportation corridors are analyzed through GIS applications and a reconsideration of settlement data from an important corridor in northern Tlaxcala. The location of the study region, within the corridor connected to the northeastern Basin of Mexico, makes it particularly relevant for examining interregional exchanges and the transformation of a more rural landscape adjacent to core areas of urbanization and state political expansion. Conclusions drawn from the study are largely complementary to the interpretations made by the surveyors [Merino Carrión, B.L., 1989. La Cultura Tlaxco. Serie Arqueológica, Colección Científica 174, Instituto Nacional de Antropología e Historia, Mexico City], but provide an updated assessment of prehispanic political evolution ca. 900 BC–AD 1519. Specifically, the study tracks the evolution of early ceremonial centers, Teotihuacan’s territorial expansion through the region, political balkanization following the collapse of Teotihuacan, and the establishment of small, independent polities encountered by the Spanish. New contributions include quantitative measures relevant to assessing the systemic integration of the region and the social value of the corridor during different chronological phases, elucidating the differing expansionary trajectories of Teotihuacan and the Aztec Empire.