The EU's role in climate change negotiations: from leader to 'leadiator'

We start with two puzzles: first, how to explain the European Union (EU)'s decline as a climate change leader at the Copenhagen summit? Second, how to understand the partial revival of its leadership position at the Durban climate summit? We advance a twofold explanation, focusing on changes in relative power relations among major powers but also on negotiation strategies and coalition building. In Copenhagen, the EU had a normative agenda and unrealistic expectations and thereby failed to forge any bridge-building coalitions. In Durban, it had moved towards a pragmatic strategy, attuned to the realities of changing power constellations. The EU approached developing countries that shared its desire for a legally binding regime covering all major emitters and probed compromises with veto players, such as China and the US. This bridge-building strategy was combined with a conditional pledge to agree to an extension of the Kyoto Protocol. In sum, the EU acted as a leadiator', a leader-cum-mediator.