My unsung hero of science: Harriet Taylor Mill, the radical feminist philosopher who lived in the shadow of her husband

I first heard about Harriet Taylor Mill when reading about her much more famous collaborator and future husband, the British philosopher and politician John Stuart Mill. Appropriately for someone who remains in the margins of history despite her enormous contribution – including to her husband’s status – Taylor Mill was deeply angered by injustice. Throughout her life, she railed against the way society made it impossible for women to freely develop their individuality, arguing this was…