Flora Tristan is best known for her book of travels to Peru (Perigrinations of a Pariah). In this chapter, we aim to study the essay On the necessity of welcoming foreign women. The need to extend a warm welcome to foreign women (1835) and a novel, Mephis. History of a proletarian (1838), to determine the discursive strategies and literary approaches the author uses in her writing to turn the negative notion of the figure of the pariah into an agent of social change. Thus, we will see how in the novel Mephis the characters move from a universe of marginality (lonely travelers, exploited proletarians, women trapped in marriages of convenience) towards new possibilities and the construction of a family project. In Tristan’s novel, romantic love is replaced by the fusion of gender roles and the creation of the female messiah.