International law guides globalization and the future of the world economy, affecting all people and our planet. Rules governing trade and investment could continue to be represented only by Hermes, the Greek god of thieves and commerce, or also draw inspiration from Athena, representing justice, wisdom and craftsmanship. This volume explores how economic treaties could be better crafted to foster—rather than frustrate—sustainable development. It explains how leading actors identify potential social and environmental impacts of shifting capital, goods and services, and pilot new economic instruments to enhance sustainability. Based on a review of World Trade Organisation (WTO) debates and over 110 other economic accords, the volume highlights innovative measures adopted by States from a selection of regional and bilateral trade and investment accords, exploring their implications for a new generation of economic agreements, including the United Kingdom’s next steps and the proposed Agreement on Climate Change, Trade and Sustainability (ACCTS). The author, an award-winning expert jurist and renowned professor of international law, examines how sustainability and justice commitments can be operationalized in treaty texts themselves, steering vital trade, investment and finance towards the world’s Sustainable Development Goals (SDGs). Adopting a ground-breaking, inter-actional and systematic approach, with examples spanning several decades of experimentation and experience, she proposes carefully crafting of legal principles and rules to contribute to sustainability. By integrating social, environmental and economic priorities, she argues, States and stakeholders can weave new rules for our common future, towards a more inclusive, greener global economy.