Michel Foucault’s critical approach to understanding power has become very influential in the study of global politics, especially in the work of (critical) IR scholars. The Foucauldian kind of power conception has influenced some IR scholars who adopt key insights from post-structuralist theory to world politics, thus producing an analytical orientation in the sense that all reality is structured first by language with discourses, then creating a coherent system of knowledge, objects, and subjects. Of particular importance is Foucault’s notion of biopower, biopolitics, and technology of power. Such a toolbox allows (critical) IR scholars to recur and distinguish disciplinary power, governmentality, its types (liberalism, neoliberalism), and biopolitics itself. However, few IR studies differentiate between biopower and biopolitics; yet an extensive variety of international studies issues are analyzed. Additionally, applying Foucault’s notions to global politics has been roundly criticized.