%0 Journal Article %T (Re %A Marco A. Vieira %J Millennium %@ 1477-9021 %D 2018 %R 10.1177/0305829817741255 %X In this article, I critically engage with and develop an alternative approach to ontological security informed by Jacques Lacan¡¯s theory of the subject. I argue that ontological security relates to a lack; that is, the always frustrated desire to provide meaningful discursive interpretations to one¡¯s self. This lack is generative of anxiety which functions as the subject¡¯s affective and necessary drive to a continuous, albeit elusive, pursuit of self-coherence. I theorise subjectivity in Lacanian terms as fantasised discursive articulations of the Self in relation to an idealised mirror-image other. The focus on postcolonial states¡¯ subjectivity allows for the examination of the anxiety-driven lack generated by the ever-present desire to emulate but also resist the Western other. I propose, therefore, to explore the theoretical assertion that postcolonial ontological security refers to the institutionalisation and discursive articulation of enduring and anxiety-driven affective traces related to these states¡¯ colonial pasts that are still active and influence current foreign policy practices. I illustrate the force of this interpretation of ontological security by focusing on Brazil as an example of a postcolonial state coping with the lack caused by its ambivalent/hybrid self-identity %K ontological security %K postcolonial subjectivity %K Brazil %K s¨¦curit¨¦ %K ontologique %K subjectivit¨¦ %K postcoloniale %K Br¨¦sil %K seguridad ontol¨®gica %K subjetividad poscolonial %K Brasil %U https://journals.sagepub.com/doi/full/10.1177/0305829817741255