The knowledge deficit hypothesis is closely tied to the idea of Homo economicus, an ontological model of the human as rationally self-interested. Historically in Western philosophy “ontology” refers to the study of being, the nature of human being, subjectivity, or what it means to be a self, epitomized in Descartes cogito. This individualized ontology has been extensively critiqued in philosophy and anthropology, but people keep arguing against it because these critiques have had little impact on the material world of economics and politics in which people are still routinely assumed to be rationally self-interested individuals. Edmund Husserl, and later Maurice Merleau-Ponty (1962) developed a highly influential phenomenological critique of the Cartesian subject and the modern self, which influenced Gregory Bateson’s Steps to an Ecology of Mind (1972), and subsequent models of the self in deep ecology, ecofeminism, and ecopsychology (see Roszak et al. 1995 for an overview). Phenomenology also inspired work in intersubjectivity such as Martin Buber’s (1970) I-Thou relations, and Emmanuel Levinas’ (1969, 1998) understanding of ethical subjectivity, as well as Bruno Latour’s (2005) development of actor network theory. Latour’s writings have stimulated fruitful dialogues with anthropologies of Indigenous ontologies. Much of this literature is well known within the environmental humanities, but has had little impact more broadly in environment studies and environmental science, and less still in in politics and economics.