Abstract

Two broad metaphysical perspectives deriving from Parmenides and Heraclitus have implications for our notion of sustainability. The Parmenidian defends a deepseated orderliness and permanence in things, while the Heraclitian finds only chance and change. Two further outlooks, the nomic (or the big-picture scientific) and the prudential, present differing accounts of our place in the world. While the nomic outlook accepts nothing privileged about the human perspective or even life itself, the prudential outlook is obviously welfare-centered. It is argued that nomic views, whether Parmenidian or Heraclitian, fail to provide any rationale for sustainability measures or concerns. The only such rationale comes from Parmenidian prudentialism, which, I argue, can operate only if it disowns at its peril the nomic point of view and couches sustainability entirely under the rubric of maximizing certain preferred opportunities drawn from collective self-love. But doing so merely evades rather than answers the tension imposed by the nomic Heraclitian for whom nothing lasts and nothing human counts specially in the measure. The liabilities of Parmenidian prudentialism are examined and found to be too great for any consistent notion of sustainability to bear