This chapter analyzes socialist aspirations for social regeneration as they evolved from the 1840s to the Commune. It contrasts the political culture of the 1840s with that of the Commune to bring into view a conceptual mutation: where socialists had once pursued social regeneration through pacific methods and universal manhood suffrage, by 1871, they linked social regeneration with republican militarism and the reincarnation of “the people in arms.” This mutation is excavated through writers such as Louise Michel, Prosper-Olivier Lissagaray, and Jules Vallès. Although this mutation was contingent, once realized, it bonded socialist dreams of regeneration to popular redemptive violence.