This thesis strives to examine the reappropriation of the Great Replacement conspiracy theory by politicians through their discourses. Through the Critical Discourse Analysis method and its Discourse Historical Approach, this analysis focuses on Éric Zemmour’s implementation of this systemic conspiracy theory as the main pillar of his presential and European elections campaigns between 2022 and 2024 in France. This research tends to highlight the roots of the Great Replacement conspiracy theory and the ideal it promotes. Finally, the overarching aim of this research is to explore the global scope of this conspiracy theory by its propensity to dichotomize the Western and Eastern populations through the lens of their culture’s differences represented as antithetical. The analysis of the intertextual and interdiscursive networks also allows to identify the way speeches travel, mutate and echo one another while being anchored in different cultural and national contexts.