Radiocarbon dates can offer important corollaries for historic events and processes, including territorial expansion and consolidation in early empires. Eighteen new radiocarbon dates from test excavations at Ak'awillay, near the Inca imperial capital of Cuzco, reveal new perspectives on interactions between the Incas and Xaquixaguana Valley groups. Rather than persisting as a regional centre, Ak'awillay declined well before early Inca expansion, remaining largely unoccupied until after an extensive empire had been established. This new chronology adds nuance to the growing understanding of local group interactions and how they contributed to Inca state development and imperial expansion.

This paper uses documents generated by the 1594–1595 composiciones de tierras in Cuzco, Peru, to discuss the economic transformation of the former heartland of the Inca Empire and the impact of Spanish administrative policies implemented in the early 1570s. The diverse social and environmental landscapes of rural areas lying to the west of Cuzco provide a range of local case studies that reveal how settlement and tribute policies of the viceroy Francisco de Toledo failed to produce sustainable colonial towns of Christian Indians. Detailed records of indigenous land repartition in the area show gender- and status-based patterns of individual allocations, as well as ecological differences in landholding between communities. The local records indicate the continuing importance of Inca-era community identities and local leadership for maintaining possession of community lands. By contrast, documents related to the composiciones among private landowners reveal vast inequalities in land access, as well as the rapid growth in the demand for indigenous labor to produce important agrarian commodities. We argue that Spanish administrative policies accelerated the transformation of the means of production in rural Cuzco, creating peasants instead of Christian Indian subjects.

The author shows how pollen and oribatid mites recovered from the small lake of Marcacocha provide a detailed proxy record of agro-pastoralism over the last 4200 years in the central Andes. The introduction of highland maize and weeding practices 2700 years ago corresponds with major settlement development, as well as evidence for large herds of llamas not only facilitating trade but supplying abundant fertilizer and fuel in the form of excrement. Prolonged droughts and pre-Colombian epidemics probably influenced many of the social changes observed.