The chapter examines how the recent onslaughts on the foundational principles of the neoliberal economic order can impact international economic law in general, and the various sustainability concerns in particular. The chapter broadly maps the historic developments in internalizing social and environmental values within the rule-based global trading system and how these developments led to slowly but steadily establishing a sustainability-based global order that is anchored in global justice. While it is reasonable to assume that the crisis within international economic law can have far-reaching implications, at least based on the recent turmoil in international economic relations including treaty practices, it is argued that a reversal of the sustainability drive is not easily conceivable or practicable. Countries and firms have invested heavily and substantially in decarbonization and sustainability measures that they find it harder to make a discernible change in direction. At the same time, the chapter makes a case for remaking international economic law to deeply embed the social, economic and environmental values within the international economic order to ensure a just and fair globalization.