An analysis of the historical and social impact of the book 'Novas Cartas Portuguesas' (New Portuguese Letters), written by Maria Isabel Barreno, Maria Teresa Horta, and Maria Velho da Costa in 1971. The article reflects on the legacy of the Carnation Revolution, the ongoing struggle for women's rights in Portugal, and current challenges such as domestic violence and access to reproductive healthcare, as highlighted by recent Amnesty International reports.