Failing to impose himself in Vichy, Déat sought his political fortunes in occupied Paris. This chapter covers Déat’s time in Paris, where he founded the Rassemblement National Populaire (RNP) in 1941. After an inauspicious start during which Déat struggled to maintain control of the organization, the RNP came to represent the collaborationist “left” within the field of collaborationism. However, the heteronomous logic of this field, in which the different collaborationist movements competed for German recognition by emulating Nazism, meant that over time the different movements shed their specificity and converged around a common vision of collaborationist fascism. It was through this spiral of radicalization that Déat came to adopt positions, like antisemitism and support for “totalitarianism,” that had been foreign to him just a few years prior. The collaborationist fascism of the RNP was thus not reducible to the neo-socialist past but was an emergent effect of the field of collaborationism.