Esther Margareta Vilar (born Esther Margareta Katzen, September 16, 1935) is an Argentine-German writer. She trained and practised as a medical doctor before establishing herself as an author. She is best known for her 1971 book The Manipulated Man and its various follow-ups, which argue that, contrary to common feminist and women's rights rhetoric, women in industrialized cultures are not oppressed, but rather exploit a well-established system of manipulating men.