This book offers the first systematic theorisation of transnational public spheres from non-Western, spatial, and infrastructural perspectives. The current era is characterised by transnational challenges, such as climate change, pandemics, and financial crises, that cannot be adequately addressed by national public spheres. Public spheres, defined as arenas of collective communication and action, are the cornerstone of any people-centred system of governance. This book puts forward a transnational public sphere theory and focuses on spatial, infrastructural, and non-Western perspectives, thus adding to the public sphere theory and practice at both national and transnational levels. The author offers a new conceptual construct, "the right to space", as a way of transnationalising the theory and addressing its efficacy issues. Providing conceptual clarity on the public-private distinction, this book examines the historical roots of the public sphere in both Asia and Europe, establishes the methodological and ontological foundations for a theory of transnational publics, and analyses contemporary empirical instances of transnational publics in both Asia and the West. This transnationalisation is crucial now that authoritarianism is on the rise and democracy is in decline worldwide. A timely addition to the literature, this book will be of interest to researchers in international relations, political science, political theory, sociology, media and communication, cultural and literary studies, and Asian studies.