Towards planetary nexus governance in the Anthropocene: An earth system law perspective

Nexus governance recognises that sustainability concerns such as water, energy, and food security are interlinked and provides an alternative to fragmented governance. Although it has been applied mostly in the domestic context, the need for nexus governance is also apparent at a planetary scale, as highlighted by interacting planetary boundaries, global telecoupling, and global tipping cascades. However, international environmental law is unable to facilitate what we call ‘planetary nexus governance’. This is mainly because international environmental law lacks an ecological Grundnorm and because its primary rules of conduct remain fragmented in the absence of effective secondary rules on how primary rules should relate to each other. Recognising this challenge, scholars have recently proposed earth system law as a new framework to rethink, in an integrated way, law in an Anthropocene context. Building on this framework, we suggest that international environmental law should adopt a unifying Grundnorm such as planetary integrity. We also suggest that international institutional law, as a body of secondary rules, has an important role to play in facilitating planetary nexus governance by bringing together fragmented bodies of international law. We briefly discuss ways in which international environmental law could reorientate itself to better facilitate planetary nexus governance.