The goal of the present work is to explore variability in Plateau mortuary assemblages, with an emphasis on that portion of the variability which can be related to socioeconomic status differentiation. By necessity the research focuses on the differential distribution of grave inclusions. Particular attention is given to discovering differences in mortuary structure between different regions of the Plateau, and between the middle prehistoric (approximately 4000-2000 B.P.), the late prehistoric (approximately 2000-200 B.P.), and the protohistoric period.