After the endorsement of the United Nations Guiding Principles on Business and Human Rights (UNGPs) by the Human Rights Council on 16 June 2011, 15 March 2024 marked another milestone for transnational corporate governance. That day, a qualified majority of the member states of the European Union (EU) voted in favour of the Directive on Corporate Sustainability Due Diligence (CSDDD) setting human rights and environmental obligations for large companies in their global value chains.1 The CSDDD is the first region-wide due diligence legislation, yet it is also a political compromise among EU member states, which civil society and business have been watching closely. This piece explains the main elements of the CSDDD and outlines some of its implications beyond the EU.