From basic to higher-order relational processes: Concepts of human-environment interactions among the Shuar

This thesis uses a biosocial anthropological approach to explore the wide variety of human-environmental interactions exhibited by the Shuar of the Ecuadorian Amazon. Based on 10 months of ethnographic inquiry and deploying a comparative and evolutionary perspective, this thesis focuses primarily on the holistic nature of ancient subsistence patterns. I delve into the adaptive strategies exhibited by the contemporary Shuar and attempt to delineate the socio-ecological, ritual and cosmological significance of these patterns of behaviour. I suggest how subsistence adaptations, like hunting, which have been greatly diminished in the Shuar communities, nevertheless reveal particular forms of cross-species interactions likely deeply rooted in coevolutionary processes. As clearly indicated by informants' oral histories, hunting patterns and meat-eating behaviour show complex trophic, socio-structural and ritual associations between humans and animal taxa. I then hypothesise that food taboos against eating particular animals (mostly large mammals) may have functioned as mechanisms for the preservation of prey and likely arose from ancient relationships with extinct megafauna. Further, concerning horticulture, a subsistence strategy still practised by the Shuar, I reveal how specific forms of human-plant interactions, such as those with Manihot esculenta Crantz and Guadua spp., inform patterns of patterns of growth, fertility and reproduction. This Amazonian form of human-plant coevolution exhibited by traditional horticulture underscores, in principle, basic and higher-order relational processes exemplified by the biosocial, ritual, ontological, and myth-cosmological associations between organismic kingdoms. Concerning the use of medicinal and psychoactive plants, I show how these kinds of botanical knowledge frequently intersect, thus representing adaptive behaviours highly dependent on embodied and cognitive engagements with plant materials. Both conceived as elementary forms of cure and primary triggers of metaphysical formulations, relationships with these elements of the plant kingdom are likely to be well-embedded in our evolutionary history. Lastly, the thesis' attempt at cross-species comparisons linked to different evolutionary periods (i.e., archaic hominins, extant forager-horticulturalists and non-human primates) may shed new light on the nature of complex adaptive patterns exhibited by Indigenous peoples in general and the Shuar in particular.