Koldo Casla is Senior Lecturer in International Law at the University of Essex. He leads the Human Rights Local project of the Human Rights Centre of the same university, and he is the Director of Essex Human Rights Centre Clinic. Previously, Dr Casla was Research Associate at the Institute of Health & Society of Newcastle University (2017-19), where he co-drafted the first Bill on Economic, Social and Cultural Rights in the UK. He was also Policy Director of the UK social rights NGO Just Fair (2016-19), independent researcher on social rights for Amnesty International Spain (2013-19), and Chief of Staff of the Human Rights Commissioner of the Parliament of the Basque Country, Ararteko (2011-13). Among other publications, Dr Casla is the author of Politics of International Human Rights Law Promotion in Western Europe: Order versus Justice (Routledge 2019), and Spain and Its Achilles' Heels: The Strong Foundations of a Country's Weaknesses (Rowman & Littlefield 2021), and co-editor of Social Rights and the Constitutional Moment: Learning from Chile and International Experiences (Hart 2022) and The European Social Charter: A Commentary, Volume 3 (Brill 2024).