Allies and Access: Implications of an American Turn Away from Alliances

Austin Carson, Rachel Metz and Paul Poast

International Organization, 2025, vol. 79, issue S1, S103-S116

Abstract: A defining feature of the post-1945 international system is the American network of allies and partners that has underpinned its global power. Recent developments within the United States and in the international system have severely strained that alliance network. If it collapses, what is at stake? Existing scholarship in International Relations highlights losses in aggregated military capabilities, reduced diplomatic support, and lost trade. In this essay we review these benefits and another that has been overlooked: ally-enabled access. Access refers to permission from allies and partners to engage in military and intelligence missions within their borders on their territory, through their airspace, or in their territorial waters. Access via America’s allies and security partners has enabled Washington to use foreign sovereign spaces for military logistics, military operations, and foreign surveillance to overcome the tyranny of distance. Examples include permission from allies and partners in the Middle East to allow the US Air Force to fly from their bases to strike targets in Afghanistan and Iraq after 9/11, and US intelligence installations built and operated by permission from Pakistani, Turkish, and Japanese territory during the Cold War. We describe the broad functions of alliances and show how access has been key to projection of American military and intelligence power at a global scale. Perhaps limiting or ending America’s global hegemonic role is desirable; perhaps it is dangerous. We argue that accounting for the contributions of access made by allies and security partners is critical if scholars, policymakers, and publics are to properly assess what is at stake in an American turn away from alliances.

Date: 2025
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