In 1915, when Labarca was still a student, she organized the Reading Circle inspired by the Reading Clubs of America. This organization allowed her to bring education and culture to women regardless of their status, who at that time were excluded. From the Reading Circle she developed the
National Council of Women in 1919, participating in it with Celinda Reyes. In 1922 she obtained the position of Extraordinary Professor of Psychology at the Faculty of Philosophy, Humanities and Education at the
University of Chile. She joined the
Radical Party as a militant. In 1922 she presented a project for improving the civil, political, and legal rights of women, which were restricted in the Civil Code of Chile (a struggle that would continue until the end of the century). In 1925, she helped achieve the adoption of a legal decree known as the Maza Law (named after
Senator José Maza) in the Civil Code that restricted the powers of custody of the father in favor of the mother. It enabled women to testify before the law and authorized married women to manage the fruits of their labor. As an educator she promoted the creation of the Experimental Manuel de Salas Lyceum for the training of future teachers in 1932. She was a founder of the
National Committee for Women's Rights, created in 1933, along with
Elena Caffarena and other women. She was appointed ambassador in 1946, by the government of President
Gabriel González Videla, as the representative of
Chile to the United Nations and head of the Status of Women section. She was also a literary critic and a writer, dealing especially with the role of women in society. She directed the Reading Circle newspaper, the Women's Action, which had outstanding participation in the struggle for women's suffrage and fighting bribery (the sale of votes). As a result, in 1944, she was elected president of the
Chilean Federation of Feminine Institutions. She established Summer Schools at the
University of Chile. She taught courses and seminars in countries throughout the Americas. In 1964 she was honored as an Academic Member of the Faculty of Education at the University of Chile, and, in 1969, the Academy of Political Science, Sociology and Morals at the Chilean Institute. ==Legacy and recognition==