Sustainability studies have not been able to come up with a consensus conceptualization of “sustainability,” despite many attempts. This article asks what this conceptual confusion means. I do this through a (conceptual history) vertical analysis, and horizontal (discourse) analysis of the current use of the term. It finds that sustainability is a perfect fit for what Hupe and Pollit have called a “magic concept,” in that it is; broad, has a positive normative charge, imply consensus or at least the possibility of overcoming current conflicts, and has global marketability (2011: 643). This has both positive and negative effects: On the one hand, the popularity of the concept of sustainability has enabled an overarching discourse on the resp...