The question, "Why has Harriet Taylor Mill appeared in the history of philosophy as she has?" has several answers. The answers intertwine the personality and politics of Harriet, the sexism of those who wrote of her (which was a reflection of the overall status of women during the period the commentator wrote), misunderstandings of the means and meaning of her collaboration with John Stuart Mill, and the disturbing challenge of her questioning.

This is a unique, groundbreaking study in the history of philosophy, combining leading men and women philosophers across 2600 years of Western philosophy, covering key foundational topics, including epistemology, metaphysics, and ethics. Introductory essays, primary source readings, and commentaries comprise each chapter to offer a rich and accessible introduction to and evaluation of these vital philosophical contributions. A helpful appendix canvasses an extraordinary number of women philosophers throughout history for further discovery and study.

For 170 years, Harriet Taylor Mill has been presented as a footnote in John Stuart Mill’s life. This volume gives her a separate voice. Readers may assess for themselves the importance and influence of her ideas on "women’s" issues such as marriage and divorce, education, domestic violence, and suffrage. And they will note the overlap of her ideas on ethics, religion, arts, and socialism, written in the 1830s, with her more famous husband’s works, published 25 years later.

The question, “Why has Harriet Taylor MM appeared in the history of philosophy as she has?” has several answers. The answers intertwine the personality and polities of Harriet, the sexism of those who wrote of her, misunderstandings of the means and meaning of her collaboration with John Stuart Mill, and the disturbing challenge of her questioning.

On Liberty celebrates a collaborative theory of knowing exemplified in the way Harriet and John worked together. They believed fervently in the power of individuals struggling together to grasp the truth – including both the “idealistic” belief that there is truth as opposed to mere subjective opinion, and a deep scepticism about the beliefs accepted by the majority.

On Liberty celebrates a collaborative theory of knowing exemplified in the way Harriet and John worked together. They believed fervently in the power of individuals struggling together to grasp the truth – including both the “idealistic” belief that there is truth as opposed to mere subjective opinion, and a deep scepticism about the beliefs accepted by the majority.