Since the 2008 economic meltdown, market-driven globalization has posed new challenges for governments. This collection introduces the innovative concept of “grey zones” of global governance, where international rules are bent or ignored. These zones are significant, contested spaces for state policy and market behaviour to interact with respect to trade, the environment, food security, and investment. Powerful incentives exist in the global economy for states to harmonize their policies through trade and investment agreements. But grey zones both promote uniformity in many areas of public life and facilitate diverse forms of capitalism in market societies. They enable governments to balance national and global economic benefits as they advance their core interests. At a time of growing nationalist sentiment, Grey Zones in International Economic Law and Global Governance explores creative local engagement with international economic law and offers a bold new way to understand public concerns about international trade and investment, food security, green energy, subsidies, and anti-dumping actions.