On the notion of “interest” in international relations

Since the notion of the “national interest” plays a pivotal role in the discourse of state action, its clarification as a normative term is historically as well as systematically important. Differing from the conventional approach, which defines the national interest according to genus and taxa, I shall argue that due to its function as a normative term the national interest cannot be understood in taxonomic categories; it necessitates an investigation of the logic of its use according to specified criteria. In this context the notion of the “public interest” is, for historical as well as systematic reasons, illuminating. As historical investigation shows, the term national interest is neither self-justificatory nor arbitrary within the conventions of the European state system until the late nineteenth century. Important changes in the international system can be traced by following the fundamentally changed usage of the term after 1870. A short comparison with and critique of Waltz's “systemic theory” of international relations concludes the article.