Abstract
The Covid-19 pandemic is a global challenge calling for a global response. But the actual responses of states, while exhibiting considerable international cooperation, are predominantly competitive and self-centered. This raises important questions about the utility of our basic intellectual tools-in the form of International Relations Theory (IRT)-for understanding the pattern of these responses. IRT analyzes inter-state dynamics and explains the extent to which states and institutions do or do not cooperate. This critique focuses on theories that stress competition (realism), those that focus on cooperation (liberalism) and those emphasising ideational constructions that could go either way (constructivism and normative theory). It seeks to elucidate the relative strengths of these theories-what they can tell us and what they cannot-in understanding responses to the current pandemic. It concludes that, while all the identified approaches have something to offer, realist theory, which highlights the prioritization of national interests over collective action, provides the most optimal approach for a full understanding of global responses to Covid-19. The analysis helps draw lessons for policy responses to this and other global crises, such as climate change.