TONI ERSKINE is Lecturer in International Politics at the University of Wales, Aberystwyth, UK. She was previously British Academy Postdoctoral Fellow at the Centre of International Studies, University of Cambridge. Dr Erskine is convenor of the British Academy Network on 'Ethics, Institutions and International Affairs' and associate editor of the journal International Relations. She has published work on 'institutional moral agency', the ethics of war and 'embedded cosmopolitanism'.