Paulo Magalhães is a Researcher at the Interdisciplinary Centre of Social Sciences at Universidade Nova Lisboa, Portugal, and received a degree in Law from the Catholic University of Porto and a postgraduate degree in Environmental Law from Coimbra University, Portugal. He is the Chair of the Common Home of Humanity, which proposes new methods to regulate the use of the Earth System.Will Steffen is a Councillor on the publicly-funded Climate Council of Australia, and is an Earth System Scientist at the Australian National University, Canberra. He is also an Adjunct Professor at the University of Canberra, working with the Canberra Urban and Regional Futures program, and a member of the ACT Climate Change Council. From 1998 to 2004, Steffen served as Executive Director of the International Geosphere-Biosphere Programme, based in Stockholm, Sweden, and is currently a Senior Fellow at the Stockholm Resilience Centre. Klaus Bosselmann, PhD, is Professor of Law at the University of Auckland. He is the founding Director of the New Zealand Centre for Environmental Law and has served as a consultant to the OECD, the EU and the governments of Germany and New Zealand, and as a legal advisor to the Earth Charter Drafting Committee. He has authored over a dozen books, including the award-winning Im Namen der Natur (1992), When Two Worlds Collide (1995), Ökologische Grundrechte (1998), and National Strategies for Sustainability (2014), among others.Maria Alexandra de Sousa Aragão is Professor of European Law at the Faculty of Law of the University of Coimbra, Portugal, and has a PhD in Public Environmental Law. She represented Portugal at the European Observatories on Natura 2000 Network and Water Framework Directive, and is a member of the ‘Avosetta’ group of experts in European Environmental Law and of the Advisory Board of the European Environmental Law Forum. Viriato Soromenho-Marques is a Professor of Political Philosophy, Philosophy of Nature, and European Ideas in the Departments of Philosophy and European Studies of the University of Lisbon. He is a member of the National Council on Environment and Sustainable Development, and served as Vice-Chair of the European Environmental and Sustainable Development Advisory Councils network and as the scientific coordinator of the Gulbenkian Environment Program.