Major powers are frequently urged to embrace grand strategies tied to particular International Relations theories. In the case of United States foreign policy, scholars generally analyse a well-known set of strategic choices – primacy, selective engagement, offshore balancing, collective security and cooperative security – favoured by relatively mainstream realist and liberal thinkers in International Relations. This article explores the evolution of cooperative security as an idea from its clear ties to liberal and neoliberal international relations theory to its current understanding in world politics, which is surprisingly consistent with many emancipatory ideals of critical

International Relations theory. Cooperative security no longer merely implies multilateralism, negotiation and arms control. Rather, security is now more frequently described as indivisible, and genuine cooperation is said to require shared decision-making and consensual practices. Non-governmental organisations are more and more granted a voice in security discussions, as are international institutions. While weapons and warfare remain important security concerns, the cooperative security agenda today includes ideas associated with human security, including environmental calamity, global inequality and hunger.