Mary Mamie O'Brien (8 July 1926 – 17 October 1998) was a feminist philosopher and professor. She taught sociology and feminist social theory in Canada until her death. She was a founding member of the Feminist Party of Canada.
Mary Maime O'Brien (8 de juliol de 1926 − 17 d'octubre de 1998) fou una filòsofa política feminista. Va ensenyar sociologia i teoria social feminista al Canadà fins a la seva mort. Va ser membre fundadora del Partit Feminista del Canadà. (ca)
Mary Mamie O'Brien (8 July 1926 – 17 October 1998) was a feminist philosopher and professor. She taught sociology and feminist social theory in Canada until her death. She was a founding member of the Feminist Party of Canada. (en)