The aftermath of the Cold War signalled a decline of the international norm of sovereignty. The ‘triumph’ of the Liberal International Order during a brief unipolar moment challenged traditional principles of sovereignty, notably non-intervention. However, recent years have seen a resurgence of affirmations of sovereignty in political discourse, coinciding with a broader narrative on the Liberal International Order’s erosion. This article attempts to make sense of this fall and rise of sovereignty. Motivated by genealogical concerns, it historicises political and scholarly conversations on the concept. First, it examines the perceived decline of sovereignty following the Cold War. Second, it traces the proliferation of sovereignty discourses in the European 2000s and 2010s back to debates surrounding the 1992 Maastricht Treaty. Third, it explores the concept of sovereigntism, charting its move from political discourse into academic debates. Finally, the article concludes with a reflection on the trajectory of sovereignty in a post-Liberal International Order world.