This document is the founding manifesto of the Brazilian Libertarian Socialist Organization (OSL), established in September 2024 following their first congress in July 2023. This document outlines the OSL’s core identity as a nationwide especifista anarchist organization, formed by the unification of several existing anarchist groups and individuals across Brazil. It details their political and ideological foundations along with their analysis of the capitalist-statist system. Additionally, the manifesto describes the OSL’s vision for a libertarian socialist society achieved through self-managed popular power and active engagement in social movements. This vision is guided by principles of unity, collective responsibility, and a commitment to long-term revolutionary transformation in Brazil.