Copenhagen School securitization theory has made significant inroads into the study of security in Western Europe. In recent years, it has also begun to gain a presence elsewhere. This is somewhat unanticipated. Given the worldwide prevalence of mainstream approaches to security, the nature of peripheral international relations, and the Western European origins and focus of the theory, there is no obvious reason to expect securitization theory to have a significant presence outside Western Europe. Adopting a reflexive notion of theory allows, the article argues, inquiry into the politics of studying security, which in turn reveals how the Western European origins and focus of securitization theory may be a factor enhancing its potential for adoption by others depending on the historico-political context. Focusing on the case of Turkey, the article locates the security literature of that country in the context of debates on accession to the European Union and highlights how securitization theory is utilized by Turkey's authors as a 'Western European approach' to security.