As explained in the Series Editors' Preface, this series is a result of workshops bringing together public and international lawyers. From the second volume onwards, the topics revolve around the International Association of Research Universities ('IARU') thematic research topics. When Kim Rubenstein began thinking about organising the fourth workshop around the theme of Movement of People, she was enthusiastic about inviting her ANU colleagues Fiona Jenkins from Philosophy and Mark Nolan from Law to join her in running it as the three of them had already been collaborating on related work. This fourth workshop 'Allegiance and Identity in a Globalised World' was inspired by interesting interdisciplinary work Kim and Fiona and Mark were developing assessing membership issues from the perspectives of citizenship law, political philosophy and social psychology. Our workshop took place on 19-21 July 2010 at the Australian National University. The thirty three paper presenters and a further group of participants, who had read all the papers, enjoyed vigorous discussion, engaging fully with each other and the material. We thank Matthew Zagor, then Deputy Director of ANU's National Europe Centre, for providing us with a dynamic venue. We thank Giovanni Di Lieto, Jacqui Field, then undergraduate student in the ANU College of Law, Kevin Boreham from the ANU College of Law, John Milfull from the University of New South Wales, Anne Macduff from the ANU College of Law, Tim Soutphommasane, then from Monash University, and Fanny Thornton from the ANU College of Law for presenting stimulating papers at the workshop even though their papers were not developed for the resulting book. We thank the National Europe Centre for funding Vito Breda's visit through their Visiting Fellowship series and the Department of Immigration and Citizenship for support in running the workshop by sending along participants for the discussion from their ranks. © Cambridge University Press 2014.