Abstract: This article examines the role of antisemitism in international politics. Drawing on a genealogy of European antisemitism, it proposes the analytic framework of the ‘enemy within’ to foreground instances when Jewish ‘enemy’ figures are positioned on both sides of the boundaries organising international political orders. This particular permutation of (racial) bordering is porous and ambivalent, even or especially as ‘hard’ and binary racial borders are simultaneously enforced. The article identifies four characteristics of the Jewish ‘enemy within’: a shared origin story with European Christendom; simultaneous presence on both sides of a (racial) boundary; a prompting of fears around contagion, infiltration and assimilation; and deployment to legitimise strategies of hyper-vigilance, surveillance and purification. The genealogy traces how the Jewish ‘enemy within’ is mobilised in consolidation or defence of, first, Christian medieval order and, second, raced nation-states, economies, and bodies, in modernity. In both periods, the Jewish ‘enemy within’ appears as both an insider and outsider whose perceived ambivalence threatens, and is mobilised to defend, religious, racial and political international orders. Finally, the article applies this framework to contemporary antisemitism. Overall, the article offers a novel engagement with antisemitism in International Relations and a tool for analysing complex forms of racial bordering in global politics.
