SynopsisSustainability has become a popular normative social and ecological goal to address conditions of unsustainability. Such terms are often definitionally and contextually vague, warranting research into forms of sustainability education as they actually exist in practice. This study ethnographically explored the theory and practice of sustainability education in an institutionalized setting, including its varied ecological, educational and infrastructural implications. It reports on a three-year institutional ethnography of an elite private school in the northeastern United States. The purpose of the research was to investigate the rootedness, emergence and subsequent embodiment of sustainability education infrastructure, including the physical and ideational construction of a 'living building' on the school's campus.Rooted in a critical realist philosophical approach toward nature, and using ecosystem complexity theory, ecological communication dynamics and political ecology as theoretical lenses, and phronetic case and abductive gestalt analyses as analytic tools, I detailed how the institution engaged in elite-driven change with social, cultural, political and material implications in their immediate and surrounding community. For example, the case study of an animal slaughter experience revealed how specific institutional frictions played out in the school's change process. By tracing particular frictions through the institutional change process, I illuminated the unique cultural and socio-material dimensions present as the institution shiftedoften controversially -to develop and accommodate the nascent sustainability education infrastructure.The emergent conception of sustainability education manifested as the downshifting of social, political and ecological responsibility to the local level and represented a larger trend in the neo-liberalization of environmentalism. I also showed how sustainability education represented a privileged, progressive, upper-class ecochic sensibility in this school and discussed implications relative to conditions of Green Capitalism and Late Industrialism. I observed the eco-chic phenomenon in the artisanal nature of food production, in mindfulness educational activities, in marketing green lifestyles to prospective parents and in the implementation and mystification of efficient green building technologies. Overall, I found that sustainability education involved a classed expectation of a virtuous future life, and this was