The Anthropocene, understood from the perspective of the creators of Earth System Science and IPCC, calls for global governance, which tends to be understood as an epistocratic, technocratic affair leaving little room for reflective rationality and politics in the agonistic sense. Using the republican repertoire, I argue that global governance thus understood is actually the last thing we need. I suggest that global environmental institutions ought to be based on ‘constitutional republicanism’. Key elements of this approach are a Machiavellian appreciation (...) of discord, agonism and ‘the political’, combined with a realistic assessment of the very diverse interests at stake in global climate politics, hence very diverse ideas about the benefits and burdens of specific global environmental strategies; and institutions based on ideas uniquely developed by republicans from Machiavelli to Mouffe allowing for human and science’s fallibility on the one hand, irreducible moral and political diversity on the other. (shrink)