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AbstractOver the past few decades, cities have repeatedly demonstrated high levels of ambition with regard to climate action. Global environmental governance has been marked by a proliferation of policy actions taken by local governments around the world to demonstrate their potential to advance climate change mitigation and adaptation. Leading 'by example' and demonstrating the extent of action that it is possible to deliver, cities have aspired to raise the ambition of national and international climate governance and put action into practice via a growing number of 'climate change experiments' delivered on the ground. Yet accounts of the potential of cities in global environmental governance have often stopped short of a systematic valuation of the nature and impact of the networked dimension of this action. This article addresses this by assessing the nature, and challenges faced by, urban climate governance in the post‐Paris era, focusing on the 'experimentation' undertaken in cities and the city networks shaping this type of governance. First, we unpack the concept of 'urban climate change experimentation', the ways in which it is networked, and the forces driving it. In the second and third parts of the article, we discuss two main pitfalls of networked urban experimentation in its current form, focusing on issues of scaling experiments and the nature of experimentation. We call for increased attention to 'scaling up' experiments beyond urban levels of governance, and to transformative experimentation with governance and politics by and in cities. Finally, we consider how these pitfalls allow us to weigh the potential of urban climate ambition, and consider the pathways available for supporting urban climate change experimentation.

Abstract
A number of economists, historians, and political scientists have begun to examine what happens when globalization unravels. From an urban point of view, this question seems at odds with current trends: the reaction to globalization has come about at a time where, paradoxically, international discussions around the future of cities and their contribution to global sustainability have galvanized international cooperation amongst multilateral, regional, private and local actors. Does this mean that we should rethink these trends? Taking this cue, we ask what happens when globalization unravels in a more focused urban way: what happens to the global city when the economic and political relationships behind the postwar international order, and in particular the post-1970 version of that order, begin to fray or come completely undone? What happens then if the globalization of the global city unravels when its core material and infrastructural conditions are now necessarily globalized? This special issue of New Global Studies seeks to open an interdisciplinary and critical debate about the real possibilities of de-globalization and the challenges, and the dangers, of an unraveling globalization in a more and more urbanized world.

The importance of technology in global affairs is visible to the naked and uninitiated eye. Yet International Relations (IR) still lacks a more systematic and critical attention to the role of technological infrastructures in contemporary global governance dynamics. Here, we seek to prompt IR scholars to move 'large technical systems' (LTSs) from the contours of IR narratives to a centre stage, as they hold the potential to respond to pressing challenges for IR scholarship. Employing LTSs to respond to recent publications on the challenge that 'global governance' poses to IR, we highlight that an STS-IR encounter can, first, revitalise 'grand questions' at the heart of IR and, second, help coping with the complexity of global governance. While this encounter does not offer a ready-tailored panacea for the troubles of IR, a more systematic inquiry into LTSs is a powerful step beyond theoretical and methodological impasses, towards greater inter-disciplinary collaboration.

Global governance is in flux. Scholarship on the practice of global governance has reimagined it as a realm of disputes and confrontation, rather than one of interest-alignment within multilateral interstate forums. A profound sense of governance deficit is provoking critical reflection both within the corridors of power and among practitioners and scholars. A call within academic circles for renewed reflection on global governance as a practice-oriented scholarship has elicited varied responses from the international relation (IR) fraternity. In taking stock of the state of the art of 'global governance theory', a number of scholars have advocated for its revival to be grounded in the kind of critical reflection often absent from mainstream IR discussion. Others contest any meaningful demarcation between IR and global governance scholarship. This forum responds to a number of converging developments. Situating contributions broadly within the notion of an interregnum, it is a first cut towards a more innovative global governance research and practice-oriented agenda. We focus, in particular, on reframing the problematique of global governance from one dominated by multilateral interstate geopolitics, towards a critical reappraisal of both structure and political economy in light of the evident complexity of global governance systems.

This book examines the role of technology in the core voices for International Relations theory and how this has shaped the contemporary thinking of 'IR' across some of the discipline's major texts. Through an interview format between different generations of IR scholars, the conversations of the book analyse the relationship between technology and concepts like power, security and global order. They explore to what extent ideas about the role and implications of technology help to understand the way IR has been framed and world politics are conceived of today. This innovative text will appeal to scholars in Politics and International Relations as well as STS, Human Geography and Anthropology. Carolin Kaltofen is Research Associate in Science Diplomacy in the Department of Science, Technology, Engineering and Public Policy at University College London, UK. Madeline Carr is Associate Professor in International Relations and Cyber Security in the Department of Science, Technology, Engineering and Public Policy at University College London, UK. Michele Acuto is Professor of Global Urban Politics in the Faculty of Architecture, Building and Planning at the University of Melbourne, Australia.--