Given the uncertainties arising from the decline of the post-Cold War liberal order, the discipline of International Relations seeks to rearticulate subjectivities amid a changing global order. The interconnection between personal subjective life and social subjective life becomes evident when we consider how affects influence political decisions, shape the perception of truth, and contribute to the construction of reality. By exploring international relations through the intersection of the evolution of psychiatry, we can see how the event of madness is not reduced to an isolated event in a single individual. Gilles Deleuze and Félix Guattari, in The Anti-Oedipus, propose that underneath every society there is a vast flow of libidinal-unconscious matter that constitutes the delirium of society. They understand delirium as the general matrix of all unconscious social investment, suggesting an intrinsic relationship between madness and thought. Influenced by this system of thought, we propose in this thesis an alternative to the orthodox conception of identity reduced to an I in the field of international relations. What we call an essentialist ontology (essence), replacing it with a Deleuzian immanent ontology, understood as an ontology of meaning (sens). Madness is conceived here not as an individual condition, but as a methodology, a post-human theorization that emphasizes the processes of becoming and differentiation, considering all bodies, human and non-human, in a constant, fluid, and relational process. In this way, taking delirium as a method, we seek to question the nature of international relations, offering a critique of the ontological presuppositions of the concept of international, which establishes a statist ontology linked to the axiom of Westphalia. We propose the need to confront identity-based structures, revealing how modern Western thought has shaped modes of thought and categories in IR. We suggest a restructuring of identity and difference through an ontology of desire and immanent lines, fundamental to a generalized theory of flows in IR, inspired by Deleuze and Guattari s philosophy of difference. Finally, the importance of this movement would be given by the exploration of the so-called affective turn in the humanities and social sciences, introducing schizoanalytic cartography as a research method. This approach offers a speculative critique of the orthodox ontology of International Relations and proposes an ontological restructuring based on Deleuze and Guattari, seeking a more relational understanding of international assemblages.