The coda demonstrates the ongoing significance of the landscape of genius for contemporary environmentalism by interpreting how Thoreau’s association with Walden Pond has been invoked in response to climate change. It uses extensive research into the psychology, sociology, and politics of climate change in order to assess what effects those invocations are likely to have and to suggest how scholars and activists can engage with Thoreau most impactfully in relation to the issue. More broadly, the coda also theorizes a new relational approach to the environmental humanities, which draws on recent developments in posthumanism, actor–network theory, systems theory, Anthropocene scholarship, and other environmental theory to explore how systems of culture intersect with and impact various other systems: social, political, economic, ecological, geochemical, etc. This method has many similarities to Traditional Ecological Knowledge. It conceptualizes knowledge as fundamentally relational and performative and redefines the humanities as a form of self-reflexive ethical agency, through which we can comprehend and (re)balance our various relations.