As this Editorial is being written, we reflect on yet another extraordinary year. While vaccination programmes brought immense hope in the fight against COVID-19, the effects of the pandemic continued to be severely felt. In particular, the borderless world that globalization had increasingly created seems to be reverting to one with legal and practical obstacles to movement and connection. Our news cycle has been dominated with reporting on constantly changing COVID-19 travel restrictions and last-minute border closures, 1 new and controversial immigration control measures, 2 and the tragic deaths of migrants in attempting to cross borders. 3 At the same time, the Director General of the International Organization for Migration noted a recordbreaking increase in the number of forcibly displaced persons combined with a significant drop in global mobility as a result of strict travel rules, described as a 'paradox not seen before in human history'. 4 An earlier Transnational Environmental Law (TEL) Editorial, in 2017, reflected on how recent inward-looking policies had affected the rule of law. 5 Protectionism materialized even more sharply in the past two years as borders closed to limit the spread of COVID-19, significantly affecting the global environmental agenda. The 26 th Conference of the Parties (COP-26) to the United Nations Framework Convention on Climate Change, 6 held in Glasgow (United Kingdom