This article explores how the Cuban-Spanish writer Gertrudis Gómez de Avellaneda (1814–1873) succeeded throughout her writings and life experiences in proclaiming her status as a pioneering champion of equality on both sides of the Atlantic, creating a transatlantic discourse of empowerment. Her writing, marked by a gendered perspective, led to the recovery of a nineteenth-century feminine national discourse. This study focuses on her controversial and enlightening novel Sab (1841), which is part of an important project that painstakingly creates a place for her at the foreground of the Hispanic world's nineteenth-century literature and feminist thought. Furthermore, it recovers the revolutionary moment in which Gómez de Avellaneda not only stepped into a globalizing world, but also freed herself through her national world, creating a discourse of freedom and justice.