This paper studies “environmental personhood” legislation as a transitional concept. A transitional concept is one whose originating context sets parameters for its pragmatic functioning even as the eventual coherence of this functioning entails deep change in this originating context. By more explicitly thematizing environmental personhood as a transitional concept, we can acknowledge worries about its entanglement with a rights paradigm emphasizing private property and human exceptionalism while still exploring how it might contribute towards deeper ecological transformation. The paper introduces Nuu-chah-nuulth (...) philosopher E. Richard Atleo’s notion of ‘phase connectors’ as a heuristic for thinking transitional tensions in environmental personhood especially in terms of the gap between its present operative strategy and possible future effects on wider imaginaries. Indeed, this gap indicates how environmental personhood’s transitional potential is entangled with challenging dominant presuppositions in what Anna Grear calls ‘law’s onto-epistemic imaginary’. Using Atleo’s heuristic and drawing on a range of sources, the paper thinks through some of the prominent fault lines and volatile dynamics of environmental personhood as a transitional concept. After establishing these critical tensions, it considers how its conceptualization in domains beyond legislative or academic articulations may or may not help induce ethico-phenomenological changes in constitutive imaginaries. Though such popular presentations are frequently reductive, understanding why and how is important if theorists can contribute to the construction of creative alternatives. (shrink)